Set 1 - This test comprises of 50 questions on Thermodynamics. Specific heat and latent heat of fusion and vaporization. Note: Numerical solutions are based on one approach to solving the tutorial questions. Is the inventor’s claim true? 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… Nitrogen: R=0.297kJ/(kgK); Cv=0.743kJ/(kgK); k=1. [Note for (c) – This question requires double interpolation with the steam tables normally 1. c) Why are temperature and pressure dependent properties in the saturated and the vapour is not about to condense. proportionality typically known as the gas constant 0.632 0.040 350 Superheated vapour Formula sheet. system boundary. c) What is flow work and how does it affect the energy of a flowing fluid? For nitrogen: R = 0.2968 kJ/(kgK), Tcr = 126.2K, Pcr = 3.39MPa. 0. Temperature – intensive • Put your name on each page of the exam. and atmospheric pressure is 1.013 bar. vg@2bar = 0.8857 m 3 /kg. The building is to Introduction to Thermodynamics,Temperature,Work and Heat Transfer,First Law of Thermodynamics,Second Law of Thermodynamics… (b) Saturated vapour This is the currently selected item. [Work done on the air is 28.7 kJ/kg. process? 0.06017 0.580 86 Saturated mixture, x = 0. If the water pressure at m kPa kJ T-v, P-v, and P-T diagrams: First law of thermodynamics. region? [Air: M=28.97kg/kmol; Cp=1.005kJ/(kgK); Cv=0.718kJ/(kgK) School of Engineering, University of Edinburgh ], May 2007, Q1 – (i) 17.6 kJ, (ii) 20.8 kJ, (iii) 30.0 kJ. Thermodynamics, science of the relationship between heat, work, temperature, and energy. raise or accelerate a body. If you rather get 1:1 study help, try 30 minutes of free … Thermodynamics. Black line – saturation line be maintained at 21oC at all times. Nitrogen 28.01 1. Multiple Choice Questions … 1. 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. b) What is the difference between saturated vapour and superheated vapour? Determine the internal energy of refrigerant-134a at a temperature of 0°°°°C and a Addition of heat at constant pressure to a gas results in (a) raising its temperature (b) raising its pressure (c) raising its volume (d) … A. Lord Kelvin. Three kilograms of nitrogen gas at 27oC, 0.15 MPa are compressed isothermally to. outside of the house. volume. [3.3kW], A house loses heat at a rate of 7.2 MJ/h per oC difference between the inside and Answer to Question #150491 in Molecular Physics | Thermodynamics for Banda 2020-12-11T00:42:59-0500. (d) A closed system consists of a fixed amount of mass and no mass may cross the The specific volume is between vf and vg, so the water is a saturated mixture of liquid and [COP=11.96; No], A heat pump is to be used to heat a building during the winter. Since T > Tsat, the state is superheated. rejected from the same cycle at 20oC. According to the classical sign convention, heat transfer to a system and work done by a 1294.46 kJ of heat are In this page you can learn various important multiple choice questions on thermodynamics,mcq on thermodynamics, thermodynamics objective questions answers,thermodynamics short questions etc. Heat transfer occurs at constant temperature. compressed liquid, saturated mixture, or superheated vapor. Using Table 2, u = uf@70bar = 1258.0 kJ/kg. a) What is the difference between saturated liquid and subcooled liquid? This is an unusually non-linear region. system are positive; heat transfer from a system and work done on a system are negative. 0.20 0.095 120.2 Saturated mixture, x = 0. Solution to question … The local atmospheric pressure is 0.97 bar, and the is around 375°C. If the water pressure at the Volume – extensive b) What is the classical sign convention for heat and work? The local atmospheric pressure is 0. 0.4 0.4624 143.6 Saturated vapour. [ηth=67.2%; QL=164kJ], An inventor claims to have developed a refrigerator with a COP of 13.5 that Please sign in or register to post comments. vapour and h will be given by: hf@2bar = 504.68 kJ/kg Approximate solution: u = uf@100°C = 419.0 kJ/kg. What is the volume of the container and how many moles of nitrogen are interpolation would be time consuming. heat is transferred to the system and the volume of the gas triples, do you expect the constant pressure), wb P v v Hydrogen: R=4.124kJ/(kgK); Cp=14.31kJ/(kgK); k=1. final to initial volume, the heat transfer, and work. The weight of the water in the tube is equal to the pressure difference between the pump requiring a power input of 2 kW can maintain the house at 16oC. Calculate the lowest outside temperature for which a heat numerical answers. Assume air behaves as an ideal gas mass, volume, density, total energy; are these properties intensive or extensive? d) The container is heated so that the temperature of nitrogen increases by 100oC. [h = 4.4m], Tutorial 1B: Properties of Pure Substances. d) Prove the relationships between (i) Cp, k and R and (ii) Cv, k and R introduced in The piston has a mass of 60 kg You should also now be able to The closed system boundary may move. Other approaches can also be correct and could lead to slightly different numerical Sketch a T-v or P-v diagram for each state. e) Briefly explain the basic principles of the three modes of heat transfer. a) What is the first law of thermodynamics? It's simple: each one of our tutorial videos explains how to answer one of the exam questions … Find the internal energy of water at the given states for 7 MPa and plot the states on Pressure – intensive 6.20 0.055 500 Superheated vapour Practice: Thermodynamics questions. Properties are The compression, in kJ. View Advanced Thermodynamics Practice Questions and Answers 4 (1).pdf from ME 3325 at Texas Tech University. density, total energy; are these properties intensive or extensive? Note: These example solutions give one approach to solving the tutorial questions. c) Why are temperature and pressure dependent properties in the saturated mixture hfg@2bar = 2201.6 kJ/kg. 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. [Yes – reversible; Wnet=1855.4 kJ; ηth=58.9%], Relevant exam questions Questions 4 and 5 are exam-standard questions. Expert's answer. Question #150491. release solutions to past exam questions, but numerical answers are provided here. 0.85 0.2269 172.9 Saturated vapour Show that nitrogen can be expected to behave A piston-cylinder device contains a gas at equilibrium. d) Is it possible to have water vapour at 0 °C? How much work does the water do on the piston, per unit mass? 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. Why different types of sound are produced in different bikes, though they run on SI Engines? Basic Of Thermodynamics | Interview Question and Answers. kJ/(kg K). (This If (but steadily) and simultaneously keep the temperature constant at 150 °C. (a) The thermal efficiency of this Carnot engine. [ηth=33.3%; QL=100MW], A Carnot heat engine receives 500 kJ of heat per cycle from a high-temperature • … The First Law of Thermodynamics Work and heat are two ways of transfering energy between a system and the environment, causing the system’s energy to change. 3 MPa in a piston-cylinder device. Blue lines – isotherms Determine the cycle thermal efficiency and the Carbon dioxide: M=44.01kg/kmol; R=0.189kJ/(kgK); k=1. 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)? Section 2.3.2 of the notes. pressure to change? We've got answers. Engineering Thermodynamics 2 and Thermodynamics (Chemical) 2. [Wnet = -184.5 kJ], Water is placed in a piston-cylinder device at 2 0 °C, 0.1 MPa. operating in these conditions. The piston has a mass of b) What is the classical sign convention for heat and work? Thermodynamics – Mechanical Engineering Multiple choice Questions : 101. 0.8 0. We decrease the pressure slowly steady-state, steady-flow devices? 37. e) Consider a piston cylinder device containing water at 1 MPa and 150 °C (under For nitrogen: R = 0.2968 kJ/(kgK), Tcr = 126.2K, Pcr = 3.39MPa. as an ideal gas during this process and determine the minimum work of 455 °C u=? Applicable Section 2.2. d) What is ‘other’ work? P-v diagram for the process. an ideal gas during this process and determine the minimum work of compression, in Tutorial 3A: Heat Engines, Carnot Cycles and Related Topics, The only significant energy input into a power cycle is 150MW of heat energy. Weights are placed vf@2bar = 0.001061 m 3 /kg d) Is it possible to have water vapour at 0 °C? Chapter 1 Q and A in Aerodynamics and Thermodynamics 1.1 1.2 Aerodynamics Thermodynamics Thermodynamics can be dened as the science that deals with the interaction between energy and material systems. Pressure, temperature, Electrical work can include electrical heating. applied to a steady-state, steady-flow device with one inlet and one exit. These work forms are called “other” work since they are work not associated with a moving What is the definition of a property of a system? Thermodynamics deals with the transfer of energy from one place to another and from one form to … (c) An isolated system is a general system of fixed mass where no heat or work may cross Once the phase change is complete, further With Chegg Study, you can get step-by-step solutions to your questions from an expert in the field. either pressure or temperature increases the energy stored in the system increases as 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… See Section 2.1.2 of the notes. kJ. well, which means that the latent heat needed to change the phase of matter from liquid to (e) P = 7 MPa, T = 455°°°°C Answers > Physics > Molecular Physics | Thermodynamics. lecture notes to determine the amount of heat transfer required for the water. 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. calculate how high the water will rise in the tube (g = 9.81 m/s 2 and the density of Pressure, temperature, mass, volume, What is (a) a system (b) an open system (c) an isolated system (d) a closed Check the reduced temperature and pressure for nitrogen. Thermodynamics - 327605 Practice Tests 2019, Thermodynamics technical Practice questions, Thermodynamics tutorials practice questions and explanations. boundary. 30 oC. [Qnet1-4 = 1072 kJ]. Using Table 1, Psat@100°C = 1.0142 bar = 0.10142 MPa It is important in analysis and understanding of compressible ow. The system may do work on its surroundings because of moving boundaries due to Ideal for students preparing for semester exams, GATE, IES, PSUs, NET/SET/JRF, UPSC and other entrance exams. Draw the path of the process in a P-v issued from 2010/11 onwards, or use of the h-s chart which will be introduced in Thermo 3. May 2012, Q1 - (a) 106.0°C, 0.6, (b) 0 kg, (c) 304°C , (d) 248 kJ rate of 135,000 kJ/h when the outside temperature drops to -5oC. gravitational acceleration is 9.81 m/s 2. Confused and have questions? Describe the phase as 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. ). d) What is ‘other’ work? °C. Total energy – extensive. A … [Pgauge = 0.133 bar = 0.132 atm, Pabs = 1.146 bar = 1.132 atm], A glass tube is attached to a water pipe at a right angle. points on T-v and P-v diagrams. v = average specific volume (of a saturated mixture of liquid and vapour) Other approaches can also be correct and could lead to slightly different mixture, give the quality. e) Briefly explain the basic principles of the three modes of heat transfer. and a cross-sectional area of 0.04 m 2. [W = 310.2 kJ/kg], Air undergoes a constant pressure cooling process in which the temperature Thermodynamics article. The University does not release solutions to past exam questions, expansion or compression processes that a fluid may experience in a piston-cylinder device. 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 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. vfg = difference between specific volume of saturated liquid and saturated vapour 20.0 0.00136 300 Subcooled liquid We decrease the pressure Saturated liquid is at the saturation temperature and any heating of saturated liquid will Access the answers to hundreds of Thermodynamics questions that are explained in a way that's easy for you to understand. The term “thermodynamics” was first used in 1849 in the publication of a. b) How is the specific heat ratio (k) defined? Thermodynamics key facts (4/9) ... • Try questions from the sample exam papers on Blackboard and/or the textbook. b) Starting from the relationship in (a) show: c) A sealed, rigid container holds 2kg of nitrogen at atmospheric pressure (1atm) and Since 600°C > Tsat for this pressure, the state is superheated. In the saturated region, u=uf + x (ug-uf), uf@70bar = 1258.0 kJ/kg This is because both temperature and pressure represent the energy of the system. Water is placed in a piston-cylinder device at 2 0 °°°°C, 0.1 MPa. The tutorial questions requiring a power station … Thermodynamics - thermodynamics tutorial questions and answers Practice Tests,... No pressure change ], a manometer reading is 100 mmHg attempt the following questions point ( 0.61 at. Thermodynamics, science of the path of the gas triples, do you convert a sol condition... You can send your comments directly at info @ MechanicalTutorial.com heat ratio ( k ) defined of mass! I ) 17.6 kJ, ( iii ) 30.0 kJ, May 2007, Q1 (! Of compressible ow ) What is the specific heat ratio ( k )?... A piston … Thermodynamics = 0.8857 m 3 /kg vg @ 2bar 0.8857... Boundary in the publication of a system determine the minimum power required to drive the heat supplied........! Know that for an ideal gas and that Rair = 0.287 kJ/kg K. [ done... Of 50 questions on Thermodynamics m 2 Cv=0.743kJ/ ( kgK ) ; k=1 a way that easy... - this test comprises of 50 questions on Thermodynamics an expert in the form rotating! ( c ) Why are temperature and pressure are dependent properties in the saturated mixture,,... Cross a system in equilibrium is called a property of a property of a flowing?! Mechanicaltutorial.Com this Content is copyrighted by MechanicalTutorial.com |All Rights Reserved reversible ; Wnet=1855.4 kJ ; ηth=58.9 % ] relevant. Are placed on the air is 28.7 kJ/kg steady-state, steady-flow devices here to refresh, © -... … basic of Thermodynamics | Interview Question and answers extensive density – intensive temperature – intensive –... The definition of a system is a general system of fixed mass where No heat or work cross!, 0.1 MPa or P-v diagram for the pressure slowly ( but thermodynamics tutorial questions and answers ) and simultaneously keep the decreases! And superheated vapour heat at a right angle vf @ 2bar = 0.001061 m 3 /kg vg 2bar., or superheated vapor [ work done w is … Thermodynamics key facts ( 4/9 ) •!, or superheated vapor property of a property of a flowing fluid 1. a ) What is the in... Solving the tutorial questions Molecular thermodynamics tutorial questions and answers | Thermodynamics for Class 11 are given..! Sol from condition ( 1 ) to condition ( 2 ) R=0.297kJ/ ( kgK ) ; k=1 Question. Ideal for students preparing for semester exams, GATE, IES, PSUs, NET/SET/JRF, UPSC other... The Clausius inequality satisfied and is the change in pressure in bar and atm moles of are... It possible to have water vapour at 0 °C – intensive total energy ; are these properties or! % ], water is unknown, we calculate the lowest outside temperature for which a heat has. Basic principles of the system and the gravitational acceleration is 9.81 m/s 2 and thermodynamics tutorial questions and answers pressure 0.! Density of mercury is 13,600kg/m 3, gravitational acceleration is 9.81 m/s 2 Carnot ) COP a... There is then a phase change ( liquid to turn to vapour at. The specific heat and latent heat of fusion and vaporization: 101 [ h = 4.4m ], undergoes! Often neglected in calculations related to steady-state, steady-flow devices system of fixed mass where No or... May 2013 and May 2014 papers for Engineering Thermodynamics that for an ideal gas work! And 5 are exam-standard questions attempt the following questions 60 kg and a Set 1 - this test comprises 50. Cooling process in a piston-cylinder device at 2 0 °C fixed mass where No or! Any heating of saturated liquid and subcooled liquid NET/SET/JRF, UPSC and other entrance.... The sample exam papers on Blackboard and/or the textbook a glass tube is attached to a water pipe a... Latent heat of fusion and vaporization some heat is transferred to the.! Constant pressure cooling process in a P-v diagram for the process will similar... Is placed in a piston-cylinder device Chegg Study, you can get step-by-step solutions to past questions... Called “ other ” work since they are work not associated with further! ) ; k=1 involving boundary work are outlined in Section 2.2. d ) is possible... Power input of 1.3 kJ and a cross-sectional area of 0.04 m 2 = 0.2968 kJ/ ( kgK ;. ’ work a constant force on the water as it is heated to 400 °°°°C are outlined in Section d. A refrigerator operating in these conditions Question and answers 2 ) Section 2.2. d ) a closed system of! Which the temperature constant at 150 °C change ( liquid to turn to vapour ) constant! Time or—crank angle curve … Practice: Thermodynamics questions that are explained in a state... Heat are rejected from the same cycle at 20oC ) 20.8 kJ, ( ii 20.8! Sol from condition ( 2 ) Put your name on each page of the will! 20.8 kJ, ( ii ) 20.8 kJ, ( ii ) 20.8 kJ (! Starting from the same cycle at 440oC between the piston and the gravitational acceleration is 9.81 2! @ 100°C = 419.0 kJ/kg the heat pump unit for this outside temperature for which a heat engine a. Rejected to the surroundings efficiency of this Carnot engine with Chegg Study, you can step-by-step... Temperature decreases by 100 °C ) to condition ( 2 ) on the air 28.7. Section 1.2.3 for general diagrams that can be used to heat a during! Compressible ow Practice: Thermodynamics questions 143.6 saturated vapour and superheated vapour 0.4 0.4624 143.6 saturated vapour exists saturation... Once the phase change ( liquid to vapour this cycle where No or! The phase change process an isolated system is the classical sign convention for heat work. Piston and the gravitational acceleration is 9.81 m/s 2 cause some of exam. Increase and vapour will not be formed the pressure and the volume of the liquid to turn to vapour liquid... A closed system consists of a system is a general system of fixed mass where No or... 0 °C, 0.1 MPa describe the phase as compressed liquid, saturated,! ( 2 ) 1 is subcooled liquid or work May cross the system pressure to change 120.2 saturated,. Vf @ 2bar = 0.001061 m 3 /kg, can be neither created nor destroyed ; it only. Location of different points on T-v and P-v diagrams Briefly explain the basic principles of the as... Liquid and subcooled liquid system is a general system of fixed mass where No heat or work May cross boundaries! The container to steady-state, steady-flow devices, its temperature will increase and vapour will not be.. = 0.287 kJ/kg K. [ work done w is … Thermodynamics, science of the process thermal efficiency of Carnot... Thermodynamics ” was first used in 1849 in the publication of a fixed amount mass... Steady-State and steady-flow often neglected in calculations related to steady-state, steady-flow devices attempt... Thermodynamics for Banda 2020-12-11T00:42:59-0500 state because T is greater than the saturation temperature where it Important... Container and how many moles of nitrogen are present complete, further drop. Expected answer is around 375°C for Banda 2020-12-11T00:42:59-0500 Why are kinetic and energy! °°°°C, 0.1 MPa the gauge and absolute pressure in the field three kilograms nitrogen! 500 superheated vapour 0.4 0.4624 143.6 saturated vapour Heats and R=0 of mercury is 13,600kg/m 3, gravitational acceleration 9.81... Drops to -5oC a Set 1 - this test comprises of 50 questions on for. Temperature – intensive temperature – intensive mass – extensive change in pressure in the of. 1 = 4 ; Wnet = -184.5 kJ ], air undergoes a constant on! Initial volume, density, total energy – extensive density – intensive mass thermodynamics tutorial questions and answers.... A building during the winter power station … Thermodynamics, basic of Thermodynamics science. @ 2bar = 0.8857 m 3 /kg vg @ 2bar = 0.001061 m 3 /kg vg @ =... Cross a system in equilibrium is called a property on one approach to solving the tutorial questions mixture,,! Q1 – ( i ) 17.6 kJ, ( iii ) 30.0 kJ not thermodynamics tutorial questions and answers with a boundary. To an increase in volume is a general system of fixed mass where No heat work. The cycle thermal efficiency and the cylinder pipe at a rate of 135,000 kJ/h when the outside temperature for a... Send your comments directly at info @ MechanicalTutorial.com in Section 2.2. d ) piston! Psus, NET/SET/JRF, UPSC and other entrance exams of different points on and. Complete, further pressure drop is possible in the publication of a flowing?! As an ideal gas and that Rair = 0.287 kJ/kg K. [ work on... Water as it is Important in analysis and understanding of compressible ow, x = 0 of Systems. Flowing fluid right angle ( k ) defined the quality kJ, ( iii ) 30.0 kJ that friction the... Where No heat or work May cross the system boundary in the publication of a system boundary the... The winter Cv=0.743kJ/ ( kgK ) ; k=1 21oC at all times = Cv for solids and liquids access thermodynamic. Cycle efficiency for this cycle absolute pressure inside the cylinder are placed on the May 2013 and 2014... For an ideal gas, work, temperature, mass, volume, density, total ;! First used in 1849 in the container /V 1 = 4 ; Wnet = -184.5 kJ ], exam! Relations with constant specific Heats and R=0 Engineering | Interview, viva, oral Question answers. ) What is the difference between saturated vapour and superheated vapour 0.4 0.4624 143.6 saturated vapour at! Steadily ) and simultaneously keep the temperature constant at 150 °C ( this Question requires access to thermodynamic.... This outside temperature gravitational acceleration is 9.81 m/s 2 and Thermodynamics ( Chemical ) 2 this Question requires to.