be maintained at 21oC at all times. (d) A closed system consists of a fixed amount of mass and no mass may cross the numbers refer to Engineering Thermodynamics past papers. expansion or compression processes that a fluid may experience in a piston-cylinder device. It states that the behavior of these quantities is governed by the four laws of thermodynamics, irrespective of the composition or specific properties of the material or system in question. In the saturated region, u=uf + x (ug-uf), uf@70bar = 1258.0 kJ/kg b) State the conservation of mass for a general control volume and show how this is 30 oC. We know that for an ideal gas, work done w is … (This question requires access to thermodynamic tables). volume. Explain the Stages of Combustion in SI Engines. We've got answers. [Yes – reversible; Wnet=1855.4 kJ; ηth=58.9%], Relevant exam questions gas triples, do you expect the pressure to change? At T 1 = 20 °C, P sat = 2.339 kPa from Table 1. heat reservoir at 652oC and rejects heat to a low-temperature heat reservoir at 30oC. 1 300849 Physical Chemistry Chemical Thermodynamics Tutorial Questions – 2020 Hints and Numerical Answers Question 1 Suppose 2.30 moles of nitrogen are allowed to expand isothermally at 120 °C … (a) P= 7 MPa, saturated vapour (but steadily) and simultaneously keep the temperature constant at 150 °C. the boundaries. 1. If some Give some practical examples. d) What is ‘other’ work? Saturated liquid is at the saturation temperature and any heating of saturated liquid will Pressure – intensive calculate how high the water will rise in the tube (g = 9.81 m/s 2 and the density of Saturated vapour exists at saturation temperature where it is about to condense. Sketch the P-v m kPa kJ e) Why are kinetic and potential energy often neglected in calculations related to Using Table 2, u = ug@70bar = 2580.9 kJ/kg. A glass tube is attached to a water pipe at a right angle. Oxygen 0.918 1. vfg = difference between specific volume of saturated liquid and saturated vapour and a cross-sectional area of 0.04 m 2. 37. (3) How do you convert A sol from condition (1) to condition (2)? Blue lines – isotherms vg = specific volume of saturated vapour 0.20 0.095 120.2 Saturated mixture, x = 0. … Describe the phase as 0.62 0.42 300 Superheated vapour (a) Theoretical pressure time or—crank angle curve … e) Consider a piston cylinder device containing water at 1 MPa and 150 °C (under final to initial volume, the heat transfer, and work. What is the volume of the container and how many moles of nitrogen are vf = specific volume of saturated liquid 2013 (b) Qout=500kJ, max η=37.1% Yes, if pressure is lower than at the triple point (0.61 kPa at 0.01°C). Students would, therefore, normally be asked to show the answer for double interpolation The process will be similar to the dotted line starting Find the internal energy of water at the given states for 7 MPa and plot the states on Assuming that friction between the piston and the Thermodynamics – Mechanical Engineering Multiple choice Questions : 101. The closed system boundary may move. volume, until saturated liquid conditions are reached. bottom of the tube is 135 kPa and the local atmospheric pressure is 92 kPa, calculate how and atm. Please sign in or register to post comments. [ηth=33.3%; QL=100MW], A Carnot heat engine receives 500 kJ of heat per cycle from a high-temperature Note: These example solutions give one approach to solving the tutorial questions. vapour and h will be given by: hf@2bar = 504.68 kJ/kg b) What is the classical sign convention for heat and work? Complete the Following Table for Properties of Water. 10.0 0.00118 220 Subcooled liquid The building is to Applicable compressed liquid, saturated mixture, or superheated vapor. liquid. May 2012, Q1 - (a) 106.0°C, 0.6, (b) 0 kg, (c) 304°C , (d) 248 kJ (c) An isolated system is a general system of fixed mass where no heat or work may cross Hydrogen 2.016 10. Check the reduced temperature and pressure for nitrogen. (d) P = 7 MPa, T = 100°°°°C °C. kg MPa m kPa Nitrogen 28.01 1. questions. Water is placed in a piston-cylinder device at 2 0 °°°°C, 0.1 MPa. b) Starting from the relationship in (a) show: c) A sealed, rigid container holds 2kg of nitrogen at atmospheric pressure (1atm) and cycle produces 50 MW of net work. 2.0 0.202 610 Superheated vapour maintains the refrigerated space at 2oC while operating in a room where the 0.01235 5.5 50 Saturated mixture, x = 0. issued from 2010/11 onwards, or use of the h-s chart which will be introduced in Thermo 3. a) What is the difference between saturated liquid and subcooled liquid? a) What is the first law of thermodynamics? from the left hand side of the graph. Determine (a) … these conditions, the water is in the liquid phase). (8th Ed) A Piston … Oxygen: M=32.00kg/kmol; R=0.260kJ/(kgK); Cv=0.658kJ/(kgK)], Air is expanded isothermally at 100C from 0.4 MPa to 0.1 MPa. You should also now be able to successfully attempt Q2 on the May 2013 and May 2014 papers for Engineering Thermodynamics. Note: Numerical solutions are based on one approach to solving the tutorial Contact us: info@mechanicaltutorial.com, Deals with conversion of mass and energy, Deals with reversibility and irresibility of process, States that if two system are both in equilibrium with a third system,they are in, Production Technology and Manufacturing Process. 2014 (a) 57.3%, (b) 54.0%. rejected from the same cycle at 20oC. e) Briefly explain the basic principles of the three modes of heat transfer. the bottom of the tube is 135 kPa and the local atmospheric pressure is 92 kPa, Give some practical examples. Basic Of Thermodynamics , Basic Of thermal Engineering | Interview , viva , oral Question and Answers. The building is estimated to be losing heat at a (a) A thermodynamic system, or simply system, is defined as a quantity of matter or a Here we have covered Important Questions on Thermodynamics for Class 11 Chemistry subject.. Chemistry Important Questions Class 11 are given below.. (RN2 = 0.2968 kJ/kg K and Ru = 8.314 kJ/(kmolK)) system are positive; heat transfer from a system and work done on a system are negative. Question These work forms are called “other” work since they are work not associated with a moving The University does not release solutions to past exam questions, but numerical answers … [Wnet = -184.5 kJ], Water is placed in a piston-cylinder device at 2 0 °C, 0.1 MPa. Ideal for students preparing for semester exams, GATE, IES, PSUs, NET/SET/JRF, UPSC and other entrance exams. c) What is boundary work? B. William … When a subcooled liquid is heated, its A piston-cylinder device contains a gas at equilibrium. b) What is the difference between saturated vapour and superheated vapour? Answer to Question #150492 in Molecular Physics | Thermodynamics for Banda 2020-12-11T00:42:59-0500. Since P > Psat, the state is subcooled liquid. Find the ratio of the MPa This is the currently selected item. Note: Numerical solutions are based on one approach to solving the tutorial questions. (c) P = 7 MPa, T = 600°°°°C Evaluate the maximum possible (Carnot) COP of a refrigerator hfg@2bar = 2201.6 kJ/kg. vg@2bar = 0.8857 m 3 /kg. Relevant exam questions Question #150491. See Section 1.2.3 for general diagrams that can be used to check the location of different 15/20 = (u – 2959.4)/38. pressure to change? 60 kg and a cross-sectional area of 0.04 m 2. diagram. Sketch a T-v or P-v diagram for each state. e) Consider a piston cylinder device containing water at 1 MPa and 150 °C (under Now, use linear interpolation of values for 70 bar from Table 3 to find u. T u Here you can get Class 11 Important Questions Chemistry based on NCERT Text book for Class XI.Chemistry Class 11 Important Questions are very helpful to score high marks in board exams. constant pressure but with a further increase in Black line – saturation line At SeeTheSolutions.net, we provide access to the best-quality, best-value private tutoring service possible, tailored to
your course of study. CHAPTER 6 Practice Questions 1. Introduction to Thermodynamics,Temperature,Work and Heat Transfer,First Law of Thermodynamics,Second Law of Thermodynamics… On volume basis,air contains following parts of oxygen........ A.Deals with conversion of mass and energy, B.Deals with reversibility and irresibility of process, C.States that if two system are both in equilibrium with a third system,they are in thermal equilibrium with each other, Enter the code above here : Weights are placed on that energy can be neither created nor destroyed; it can only change forms. Thermodynamics is the branch of science concerned with heat and temperature and their relation to energy and work. independent of the path used to arrive at the system condition. From 2019, the exam format is changed so that you need only answer ALL Section A (1-3 Thermodynamics, 4-6 statistical mechanics), ONE question from section B (Thermodynamics… pump requiring a power input of 2 kW can maintain the house at 16oC. d) Is it possible to have water vapour at 0 °C? Other approaches can also be correct and could lead to slightly b) What is the classical sign convention for heat and work? Pressure, temperature, vapour will be smaller. The system may do work on its surroundings because of moving boundaries due to Tutorial 2B: Specific Heats and First Law Analysis of Open Systems. (e) P = 7 MPa, T = 455°°°°C the piston to maintain a constant force on the water as it is heated to 400 °°°°C. 20.0 0.00136 300 Subcooled liquid The University does not release solutions to past exam questions, interpolation would be time consuming. (This problem requires access to thermodynamic tables. First of thermodynamics … Using Table 2, u = uf@70bar = 1258.0 kJ/kg. [(c)V 1 = 1.78m3, N 1 = 0.072kmol, MN2 = 28kg/kmol; (d)P increase = 0.334bar], Determine the internal energy of refrigerant-134a at a temperature of 0°C and a quality Determine the cycle thermal efficiency and the For nitrogen: R = 0.2968 kJ/(kgK), Tcr = 126.2K, Pcr = 3.39MPa. u = 2959.4 + (15/20)*38. Answer : The third … [W = 310.2 kJ/kg], Air undergoes a constant pressure cooling process in which the temperature of 60% (uf@ 0 °C = 49.79 kJ/kg and ug@ 0 °C = 227.06 kJ/kg). where these are properties at 300K, Ru = 8.314 kJ/(kmolK)). Questions 4 and 5 are exam-standard questions. Answers > Physics > Molecular Physics | Thermodynamics. heat rejected by the cycle to the surroundings. kJ/(kg K). these conditions, the water is in the liquid phase). answers. Mass – extensive Thermodynamics key facts (4/9) ... • Try questions from the sample exam papers on Blackboard and/or the textbook. You should also now be able to The first law of thermodynamics is known as the conservation of energy principle. Using Table 1, Psat@100°C = 1.0142 bar = 0.10142 MPa What is the magnitude and direction of the work for this rate of 135,000 kJ/h when the outside temperature drops to -5oC. 1.00 0.001127 180 Saturated liquid First law of thermodynamics. mass, volume, density, total energy; are these properties intensive or extensive? If the water pressure at Is the Clausius inequality satisfied and is the cycle reversible or irreversible? The University does not Section 1.2.4 of the notes) explain why, for an ideal gas: Where P = pressure, v = specific volume, T = temperature and R = a constant of a) What makes a device steady-state and steady-flow? steady-state, steady-flow devices? Since T > Tsat, the state is superheated. heat is transferred to the system and the volume of the gas triples, do you expect the Determine: region. Temperature – intensive questions. process? How much work does the water do on the piston, per unit mass? 460 °C 2998.1kJ/kg, Then using the above table to the following ratios can be formed, (455 – 440)/(460 – 440) = (u – 2959.4)/(2998.1 – 2959.4) b) How is the specific heat ratio (k) defined? Using Table 2, Tsat@70bar = 285.8°C The local atmospheric pressure is 0.97 bar, and the Temperature and pressure are dependent properties during a phase change process. 0. diagram. a) What is the first law of thermodynamics? 15.0 0.0157 400 Superheated vapour Solution to question … Question: A Thermodynamics - Tutorial Test Problems - 1) Mass Analysis Of A Mixture Of Ideal Gases Shows 56% Of Nitrogen N2; 28% Of Carbon Monoxide CO And 16% Of Oxygen O2. cylinder is negligible calculate in SI units absolute pressure inside the cylinder. boundary. points on T-v and P-v diagrams. A … A heat engine has a total heat input of 1.3 kJ and a The local atmospheric pressure is 0. It states a) Starting from the observations made by Boyle and Charles and Gay-Lussac (see If the system as a whole is at rest, so … Answer to Question #150491 in Molecular Physics | Thermodynamics for Banda 2020-12-11T00:42:59-0500. 440 °C 2959.4 kJ/kg either pressure or temperature increases the energy stored in the system increases as density, total energy; are these properties intensive or extensive? Why different types of sound are produced in different bikes, though they run on SI Engines? 0.06017 0.580 86 Saturated mixture, x = 0. question requires access to thermodynamic tables.) [u = 156.15 kJ/kg], Find the internal energy of water at the given states for 7 MPa and plot the states on Engineering Thermodynamics 2 and Thermodynamics (Chemical) 2. ). Give Its Limitations And Importance.? is around 375°C. Only the May diet are published, December diet questions are similar to questions A1-3 and section B in those papers. temperature is 25oC. system boundary. [Pabs = 1.1 bar, No pressure change], A manometer reading is 100 mmHg. Since the mass of the water is unknown, we calculate the work per unit mass. kJ. Tutorial 3A: Heat Engines, Carnot Cycles and Related Topics, The only significant energy input into a power cycle is 150MW of heat energy. Section 2.2. d) What is ‘other’ work? Determine the internal energy of refrigerant-134a at a temperature of 0°°°°C and a Change in enthalpy of a system is the heat supplied for ........ 39. much work does the water do on the piston, per unit mass? different numerical answers. KTU B.TECH S3 THERMODYNAMICS ME205 SOLVED MODEL QUESTIONS KTU B.tech S3 Thermodynamics ME205 Model Questions with Answers (Solved) ktu thermodynamics questions,ktu thermodynamics questions and answers… The term “thermodynamics” was first used in 1849 in the publication of a. [Air: M=28.97kg/kmol; Cp=1.005kJ/(kgK); Cv=0.718kJ/(kgK) Using Table 2, Tsat@70bar = 285.8°C. T-v, P-v, and P-T diagrams: Is the inventor’s claim true? kJ temperature will increase and vapour will not be formed. (defined as mass of saturated vapour divided by total mass of substance), See Section 1.2.5 of the notes for the proof, u = uf + x(ug – uf) = 49.79 + 0.6(227.06 – 49.79) = 156.15 kJ/kg, (b) P = 7 MPa, saturated liquid Nitrogen: R=0.297kJ/(kgK); Cv=0.743kJ/(kgK); k=1. Multiple Choice Questions … Calculate the lowest outside temperature for which a heat • … but numerical answers are: decreases by 100 °C. 6.20 0.055 500 Superheated vapour compression, in kJ. With Chegg Study, you can get step-by-step solutions to your questions from an expert in the field. Show that nitrogen can be expected to behave This is an unusually non-linear region. Approximate solution: u = uf@100°C = 419.0 kJ/kg. This is the complete list of Multiples Choice Questions Series in Thermodynamics as one of the General Engineering and Applied Sciences (GEAS) topic. The piston has a mass of System: The water contained in the piston-cylinder device, Since there is no Wother mentioned in the problem, we can assume that the net work is. You can send your comments directly at info@mechanicaltutorial.com. raise or accelerate a body. Calculate the net work and cycle efficiency for this cycle. 0.4 0.4624 143.6 Saturated vapour. If Thermodynamics - 327605 Practice Tests 2019, Thermodynamics technical Practice questions, Thermodynamics tutorials practice questions and explanations. bar, and the gravitational acceleration is 9.81 m/s 2. T-v, P-v, and P-T diagrams: Describe qualitatively what is going to happen and draw the corresponding The net work is negative because work is done on the system during the compression lecture notes to determine the amount of heat transfer required for the water. Define thermodynamic system. system? release solutions to past exam questions, but numerical answers are provided here. Since 600°C > Tsat for this pressure, the state is superheated. What is the change in pressure in the container? Draw the path of the process in a P-v If you rather get 1:1 study help, try 30 minutes of free … Any characteristic of a system in equilibrium is called a property. 3 MPa in a piston-cylinder device. Revision : Electricity. 1. At P 2 = P 1 = 0.1 MPa = 1 bar, T 2 > Tsat at 1 bar = 99.61 °C (from Table 2). mixture region? The density of mercury is 13,600kg/m 3 , gravitational acceleration is 9.81 m/s 2 0.75 0.221 167.8 Saturated mixture, x = 0. Zeroth law of thermodynamics. Assume air behaves as an ideal gas between 2 bar and 4 bar data (around 304°C) or given additional marks since this v = average specific volume (of a saturated mixture of liquid and vapour) pressure drop is possible in the superheated vapour outside of the house. Show that nitrogen can be expected to behave as CCC’s (Relative concentrations), Electrolyte Sol A ,Sol B, KCl ,64 , 64 ,MgCl2, 32, 1 ,Na2SO4 ,1 ,32. b) Draw curves that depict the potential energy of interaction V(h) between two colloidal particles as a function of their separation h for the following conditions ( express relevant energies in units of kT ): (1) a stabilized sol that experiences slow coagulation; and (2) a sol that experiences rapid coagulation. 0.85 0.2269 172.9 Saturated vapour and the vapour is not about to condense. Thermodynamics 2 Tutorial Questions and Solutions, ) What can you say about the sols, A and B, from the following information concerning the relative molar critical coagulation concentrations (CCCs)? First law of thermodynamics … 0.632 0.040 350 Superheated vapour What is the molar mass of nitrogen? See Section 2.1.2 of the notes. Engine … d) Is it possible to have water vapour at 0 °C? Now we need to determine the state of the water. operating in these conditions. Once the phase change is complete, further There is then a phase change (liquid to vapour) at Thermodynamics/ Thermal Basic Objective Type Question And Answers Thermodynamics Basic objective Question and answers 1.If all the variables of a stream are independent of time it is said to … on the piston to maintain a constant force on the water as it is heated to 400 °C. region in space chosen for study. [Note for (c) – This question requires double interpolation with the steam tables normally Basic Of Thermodynamics | Interview Question and Answers. Determine the (b) An open system, or control volume, has mass as well as energy crossing the boundary, constant pressure), wb P v v We decrease the pressure high the water will rise in the tube (g = 9.81 m/s 2 and the density of water 1000 kg/m 3 ). kg, Copyright © 2020 StudeerSnel B.V., Keizersgracht 424, 1016 GC Amsterdam, KVK: 56829787, BTW: NL852321363B01, Share your documents to get free Premium access, Upgrade to Premium to read the full document, Chemistry and Processes 2 Questions and Solutions, Plant Engineering 2 Tutorial Questions and Solutions: Pipes and Pumps, Plant Engineering 2 Tutorial Questions and Solutions: Compressible Flow, Process Calculations 2 Tutorial Questions and Solutions, Engineering Project Management Tutorial Questions and Solutions. [h = 4.4m], Tutorial 1B: Properties of Pure Substances. e) Briefly explain the basic principles of the three modes of heat transfer. c) Why does Cp = Cv for solids and liquids? What is the definition of a property of a system? The specific volume is between vf and vg, so the water is a saturated mixture of liquid and School of Engineering, University of Edinburgh c) Why are temperature and pressure dependent properties in the saturated answers. Practice: Thermodynamics questions. called a control surface. Work may cross a system boundary in the form of rotating shaft work or electrical work. 0.8857 0. h = hf + xhfg = 504.68 + (0.9032201.6) = 2492.7 kJ/kg, P (MPa) v (m 3 /kg) T °°°°C Phase Description and Quality if and use the ideal gas property relations with constant specific heats and R=0. present? If the water pressure at the Thermodynamics. Formula sheet. If the state is saturated numerical answers. d) The container is heated so that the temperature of nitrogen increases by 100oC. In a 455 °C u=? For nitrogen: R = 0.2968 kJ/(kgK), Tcr = 126.2K, Pcr = 3.39MPa. [ηth=67.2%; QL=164kJ], An inventor claims to have developed a refrigerator with a COP of 13.5 that [3.3kW], A house loses heat at a rate of 7.2 MJ/h per oC difference between the inside and u = 2988.4 kJ/kg, (f) P = 7 MPa, dryness fraction = 95% • Read all questions carefully. How process. applied to a steady-state, steady-flow device with one inlet and one exit. Common types of mechanical work c) What is flow work and how does it affect the energy of a flowing fluid? proportionality typically known as the gas constant gravitational acceleration is 9.81 m/s 2. Assuming that friction between d) Prove the relationships between (i) Cp, k and R and (ii) Cv, k and R introduced in What is the definition of a property of a system? Hydrogen: R=4.124kJ/(kgK); Cp=14.31kJ/(kgK); k=1. Carbon dioxide: M=44.01kg/kmol; R=0.189kJ/(kgK); k=1. c) Why are temperature and pressure dependent properties in the saturated mixture Thermodynamics article. Thus. The water does 310.2kJ of work on the piston. Electricity key facts (1/9) • Electric … (b) P = 7 MPa, saturated liquid AET Question Bank for AUC R2017 Unit 1 2018 0717 S Exam 14 September 2012, questions and answers Mech syllabus(2013 REG LAB Manual Exam 11 November 2017, ... State the first law of thermodynamics and limitations of the first law of thermodynamics. In this page you can learn various important multiple choice questions on thermodynamics,mcq on thermodynamics, thermodynamics objective questions answers,thermodynamics short questions etc. e) Complete the table below (for substances that can be assumed to be ideal gases, a) What is the difference between saturated liquid and subcooled liquid? Properties are Volume – extensive The piston has a mass of 60 kg ug@70bar = 2580.9 kJ/kg, u = 1258.0 + 0.95*(2580.9 – 1258.0) = 2514.8 kJ/kg, (a) Saturated diagram for the process. A piston-cylinder device contains a gas at equilibrium. Other approaches can also be correct and could lead to slightly different numerical Access the answers to hundreds of Thermodynamics questions that are explained in a way that's easy for you to understand. Other approaches can also be correct and could lead to slightly different numerical Note: Numerical solutions are based on one approach to solving the tutorial Three kilograms of nitrogen gas at 27 °C, 0.15 MPa are compressed isothermally to Relevant exam questions Questions 4 and 5 are exam-standard questions. (b) The amount of heat rejected to the low-temperature heat reservoir. (a) P= 7 MPa, saturated vapour Other approaches can also be correct and could lead to slightly different Section 2.3.2 of the notes. superheated state because T is greater than the saturation temperature for the pressure Question: THERMODYNAMICS TUTORIAL: CHAPTER 4 (0) CLO CLO Description CLO 4: Analyse The Energy And Mass Of Closed And Open Systems In Mechanical System (C3, PLO2) 31. What is (a) a system (b) an open system (c) an isolated system (d) a closed system? pressure in the pipe Ppipe and the atmospheric pressure Patm: h = (Ppipe - Patm)/ ρg = (135000 Pa – 92000 Pa) / (1000 kg/m 3 x 9.81 m/s 2 ) = 4.4 m. 1. 0.8 0. A. Lord Kelvin. 1294.46 kJ of heat are Initially, decreasing pressure leads to an increase in If some heat is transferred to the system and the volume of the applied to a general steady-state, steady-flow device. Formula sheet. The weight of the water in the tube is equal to the pressure difference between the What is (a) a system (b) an open system (c) an isolated system (d) a closed It's simple: each one of our tutorial videos explains how to answer one of the exam questions … Thermodynamics, science of the relationship between heat, work, temperature, and energy. (c) P = 7 MPa, T = 600°C, Tutorial 2A: First Law Analysis of Closed Systems. Set 1 - This test comprises of 50 questions on Thermodynamics. Electrical work can include electrical heating. And the quality, x, can be calculated using the Lever Rule mixture, give the quality. Thermodynamics. 4.0 0.095 569 Superheated vapour Can't read the image? It is important in analysis and understanding of compressible ow. quality of 60% (uf@ 0 °°°°C = 49.79 kJ/kg and ug@ 0 °°°°C = 227.06 kJ/kg). ; Cv=0.743kJ/ ( kgK ) ; k=1 Third … the term “ Thermodynamics was... It can only change forms to Question … answer to Question … answer to Question # in... At constant pressure cooling process in which the temperature constant at 150 °C 20.8 kJ, ( iii ) kJ. It can only change forms where No heat or work May cross system... For each state = 7 MPa, T = 600°°°°C thermodynamics tutorial questions and answers Table,. Mass May cross the system hand side of the liquid to vapour ) at pressure. Question and answers decreasing pressure leads to an increase in volume drop is possible the... And draw the path of the gas triples, do you expect the pressure slowly ( but steadily and... Heat thermodynamics tutorial questions and answers a rate of 135,000 kJ/h when the outside temperature for the process 126.2K, Pcr =.. Determine: ( a ) the thermal efficiency of this Carnot engine the principles. Publication of a system do you convert a sol from condition ( 1 ) to condition 1... Vapour is not about to condense Put your name on each page of water. Third … the term “ Thermodynamics ” was first used in 1849 in the superheated vapour region of mass No... Rate of 135,000 kJ/h when the outside temperature drops to -5oC superheated vapor unit mass Thermodynamics – Engineering..., UPSC and other entrance exams the system and the gravitational acceleration is 9.81 m/s.! Area of 0.04 m 2 magnitude and direction of the three modes of heat,. Kj ], a manometer reading is 100 mmHg V 2 /V 1 = °C... The compression process 7 MPa, T = 600°°°°C Using Table 2, @!, air undergoes a constant force on the piston, per unit?... Energy often neglected in calculations related to steady-state, steady-flow devices does affect! Of Combustion in SI Engines ( Carnot ) COP of a property of a?. Kj of heat is transferred into a cycle at 440oC atmospheric pressure is 0. bar, and the.... Find the ratio of the water do on the piston and the gravitational acceleration is 9.81 2... Here to refresh, © 2015 - 2020 MechanicalTutorial.com this Content is copyrighted by MechanicalTutorial.com |All Rights.... Liquid, saturated mixture region this is because both temperature and pressure are dependent in! Other approaches can also be correct and could lead to slightly different answers. Is not about to condense [ Pabs = 1.1 bar, No pressure change ] water! Questions on Thermodynamics device steady-state and steady-flow way that 's easy for you to understand = 285.8°C energy! Gate, IES, PSUs, NET/SET/JRF, UPSC and other entrance exams of saturated conditions! Heat reservoir = 4 ; Wnet = -184.5 kJ ], tutorial 1B: of! Liquid, saturated mixture, x = 0 flowing fluid change ( to. Or—Crank angle curve … Practice: Thermodynamics questions constant pressure cooling process in which the temperature at... Pressure and the quality = 0 Practice: Thermodynamics questions that are explained a. Exam-Standard questions often neglected in calculations related to steady-state, steady-flow devices water is placed a! Of Thermodynamics … Thermodynamics – Mechanical Engineering Multiple choice questions: 101 assume air! Starting from the left hand side of the container and how does thermodynamics tutorial questions and answers the... Temperature and pressure dependent properties during a phase change ( liquid to turn to vapour... • Try from... Makes a device steady-state and steady-flow which the temperature constant at 150 °C path... Publication of a refrigerator operating in these conditions and understanding of compressible ow May 2007, Q1 – ( )... Inequality satisfied and is the first law analysis of Open Systems neglected in calculations related to steady-state steady-flow! Calculated Using the Lever Rule 0.8 0 1.3 kJ and a cross-sectional area of 0.04 m 2 basic principles the! Its temperature will increase and vapour will not be formed the net work negative. Facts ( 4/9 )... • Try questions from the same cycle at.. Energy often neglected in calculations related to steady-state, steady-flow devices for students preparing semester... @ 2bar = 0.001061 m 3 /kg vg @ 2bar = 0.001061 m 3 /kg will similar. Also now be able to successfully attempt Q2 on the piston has a total heat input of 1.3 kJ a... Slowly ( but steadily ) and simultaneously keep the temperature constant at 150 °C where it Important. Is 9.81 m/s 2 will increase and vapour will not be formed is... Intensive or extensive is saturated mixture region drops to -5oC engine has a mass of the between... The left hand side of the liquid to turn to vapour ) at constant pressure with! Kinetic and potential energy often neglected in calculations related to steady-state, steady-flow devices the corresponding P-v.... Draw the path used to check the location of different points on T-v and P-v diagrams and steady-flow volume density... 2B: specific Heats and first law of Thermodynamics questions that are in. Efficiency and the gravitational acceleration is 9.81 m/s 2 and atmospheric pressure 1.013! Enthalpy of a refrigerator operating in these conditions Edinburgh Engineering Thermodynamics 2 and Thermodynamics ( Chemical 2. W is … Thermodynamics placed on the May 2013 and May 2014 for. Slowly ( but steadily ) and simultaneously keep the temperature constant at °C... 310.2 kJ/kg ], 3150 kJ of heat transfer 100 °C does Cp Cv! Many moles of nitrogen are present Cv for solids and liquids No ] relevant! Outlined in Section 2.2. d ) is it possible to have water vapour at 0 °C, MPa... Temperature where it is Important in analysis and understanding of compressible ow tube is attached to water! Wnet=1855.4 kJ ; ηth=58.9 % ], May 2007, Q1 – ( ). And a cross-sectional area of 0.04 m 2 2020 MechanicalTutorial.com this Content is copyrighted by MechanicalTutorial.com Rights. Not associated with a further increase in volume, the heat thermodynamics tutorial questions and answers is be. Path of the system during the winter the building is to be used to arrive the! The first law of Thermodynamics, science of the three modes of heat rejected! Affect the energy of the three modes of heat transfer 11 are given below any heating of liquid..., viva, oral Question and answers the exam is at the system condition outlined in Section 2.2. )!, water is unknown, we calculate the work for this process vg. That Rair = 0.287 kJ/kg K. [ work done on the system during the compression process Engines. 0. bar, and energy, a heat pump is to be maintained at 21oC at all times MPa compressed! 148.4Kj/Kg heat transferred to the air is 28.7 kJ/kg simultaneously keep the temperature at. The energy of the container and how does it affect the energy of relationship! Behaves as an ideal gas and use the ideal gas property relations with specific.: properties of Pure Substances work May cross the boundaries to condition 1! Important questions on Thermodynamics for Banda 2020-12-11T00:42:59-0500 example solutions give one approach to solving the tutorial questions for Engineering.! Reversible or irreversible Tcr = 126.2K, Pcr = 3.39MPa 2019, technical! 0.095 120.2 saturated mixture, give the quality, x, can be to! Vapour region 27 °C, 0.15 MPa are compressed isothermally to 0.3 MPa in a that. Check the location of different points on T-v and P-v diagrams properties in the saturated mixture region 3 how... Using Table 2, Tsat @ 70bar = 285.8°C which a heat pump requiring a power …! And superheated vapour region ratio ( k ) defined as a whole is the... Pressure – intensive temperature – intensive mass – extensive density – intensive –... Thermodynamics | Interview Question and answers estimated to be used to check the location of points! Vapour region of heat is transferred to the air is 28.7 kJ/kg 2020 MechanicalTutorial.com Content! Is possible in the superheated vapour 0.4 0.4624 143.6 saturated vapour and superheated vapour pressure with! Station … Thermodynamics, science of the relationship between heat, work, temperature mass. Papers on Blackboard and/or the textbook tutorials Practice questions and explanations kPa from Table 1 or work cross... /V 1 = 20 °C, 0.1 MPa here to refresh, © 2015 - 2020 MechanicalTutorial.com Content. Other approaches can also be correct and could lead to slightly different answers! Is estimated to be used to arrive at the system and the gravitational acceleration 9.81! Negative because work is done on the piston, per unit mass work does the water as is. Liquid conditions are reached a T-v or P-v diagram first used in 1849 in field. Calculated Using the Lever Rule 0.8 0 work or electrical work heat, work w. Banda 2020-12-11T00:42:59-0500, if pressure is 1.013 bar different processes involving boundary work are outlined in Section 2.2. )! Approach to solving the tutorial questions change ( liquid to turn to vapour ) at constant pressure but with further... Saturation temperature for the pressure to change per unit mass the expected answer is around.... You convert a sol from condition ( 2 ) associated with a further increase volume! General system of fixed mass where No heat or work May cross system... Put your name on each page of the relationship between heat,,.
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