| Free Question Bank for JEE Main & Advanced Physics Thermodynamical Processes or into work. Its heat capacity for 2nd process is, question_answer35) Heat energy absorbed by a system in going through a cyclic process shown in the given figure is. question_answer34) During an adiabatic process an object does 100 J of work and its temperature decreases by 5K. A monoatomic ideal gas goes through a process $p={{p}_{0}}-\alpha V$ where ${{p}_{0}}$ and $\alpha$ are positive constants and V is its volume. Let$\Delta {{U}_{1}}$, $\Delta {{U}_{2}}$and $\Delta {{U}_{3}}$be the change in internal energy of the gas is these three processes. Videos The gas has a higher ternperature $\,{{T}_{2}}$ at the final states a and b, which it can reach the paths shown. The First Law can be expressed as the change in internal energy of a system equals the amount of energy added to a system (Q), such as heat, minus the work expended by the system on its surroundings (W).. question_answer45) Starting with the same initial conditions, an ideal gas expands from volume ${{V}_{1}}$ to ${{V}_{2}}$ in three different ways. Choose the incorrect statement related to an isobaric process. Without the ability of a system to use energy within the system to do work â the heart of thermodynamics â there would be nothing for physicists to study. question_answer1) When an ideal monoatomic gas is heated at constant pressure, the fraction of the heat energy supplied which increases the internal energy of the gas is, question_answer2) The internal energy change in a system that has absorbed 2 Kcal of heat and done 500 J of work is, question_answer3) In a given process on an ideal gas, $dW=0$and $dQ\text{ }<\text{ }0.$Then for the gas, question_answer4) Unit mass of a liquid with volume ${{V}_{1}}$ is completely changed into a gas of volume K, at a constant external pressure P and temperature T. If the latent heat of evaporation for the given mass is L, then the increase in the internal energy of the system is, question_answer5) Two kg of water is converted into steam by boiling at atmospheric pressure. The slopes of isothermal and adiabatic curves are related as, 2 k mol of hydrogen at NTP expands isobarically to twice its initial volume. question_answer53) Figure shows the variation of internal energy (U) with the pressure (P) of 2.0 mole gas in cyclic process abcda. Molar specific heat of the gas at constant volume is 3R/2. Browse videos, articles, and exercises by topic. The volume changes from $2\times {{10}^{-3}}{{m}^{3}}$ to $3.34{{m}^{3}}.$The work done by the system is about. Here, heat, temperature, specific heat, and latent heat are concepts which are studied. Study Packages The temperature of gas at c and d are 300 K and 500 K. calculate the heat absorbed by the gas during the process. If the gas is taken from state A to B via process in which the net heat absorbed by the system is 12 cal, then the net work done by the system is $\left( 1\text{ }cal=4.19J \right)$, question_answer82) A Carnot engine is working between $127{}^\circ C$ and $27{}^\circ C.~$The increase in efficiency will be maximum when the temperature of, question_answer83) When 1 kg of ice at $0{}^\circ C$ melts to water at $0{}^\circ C,$the resulting change in its entropy, taking latent heat of ice to be 80 cal/${}^\circ C$, is, question_answer84) If the energy input to a Carnot engine is thrice the work it performs then, the fraction of energy rejected to the sink is, question_answer85) The efficiency of an ideal gas with adiabatic exponent $'\gamma '$ for the shown cyclic process would be, question_answer86) In a Carnot engine, the temperature of reservoir is $927{}^\circ C$ and that of sink is$27{}^\circ C$. The amount of heat supplied to the gas in the process 1, 2, 3 and 4 are ${{Q}_{1}}$, ${{Q}_{2}}$, ${{Q}_{3}}$ and ${{Q}_{4}}$ respectively, then correct order of heat supplied to the gas is [AB is process-1, AC is process-2, AD is adiabatic process-3 and AE is process-4]. | If the pressure in the state B is ${{P}_{0}}/2$ then the pressure of the gas in state C is, question_answer52) Certain perfect gas is found to obey $P{{V}^{3/2}}=$ constant during an adiabatic process. question_answer26) A thermodynamic system undergoes cyclic process ABCDA as shown in fig. question_answer76) Suppose 0.5 mole of an ideal gas undergoes an isothermal expansion as energy is added to its heat Q. Graph shows the final volume ${{V}_{f}}$ versus Q. When the state of a gas adiabatically changed from an equilibrium state A to another equilibrium state B an amount of work done on the system is 35 J. As a result, the internal energy of the gas: question_answer7) The internal energy of an ideal gas depends upon, question_answer8) Thermodynamics is concerned in part with transformations between, question_answer9) 110 joules of heat is added to a gaseous system, whose internal energy is 40J; then the amount of external work done is, question_answer10) The change in internal energy of a thermo- dynamical system which has absorbed 2 kcal of heat and done 400 J of work is $(1\text{ }cal=4.2J)$, question_answer11) If the amount of heat given to a system is 35 J and the amount of work done on the system is 15 J, then the change in internal energy of the system is, question_answer12) A perfect gas goes from a state A to another state B by absorbing $8\times {{10}^{5}}J$ of heat and doing $6.5\times {{10}^{5}}J$ of external work. If the rise in temperature of the gas in A is 30 K, then the rise in temperature of the gas in B is, The specific heat of a gas at constant pressure is greater than the specific heat of the same gas at constant volume because, The specific heat of a gas in an isothermal process is, The work done in an adiabatic change in a particular gas depends only upon. The work done during isobaric compression is, question_answer79) 1 gm of water at a pressure of $1.01\times {{10}^{5}}$ Pa is converted into steam without any change of temperature. If ${{C}_{p}}/{{C}_{v}}=1.4,$ the slope of the adiabatic curve passing through this point is: A refrigerator with coefficient of performance releases 200 J of heat to a hot reservoir. | An inventor claims its efficiency to be 26%, then: question_answer60) A steam engine takes 0.1 kg of steam at $100{}^\circ C$ per minute and cools it down to $20{}^\circ C.$What is the heat rejected by the steam engine per second? The work done by gas in going from state B to C is double the work done by gas in going from state A to B. Free Question Bank for NEET Chemistry Thermodynamics. A gas is compressed from a volume of $2{{m}^{3}}$ to a volume of $1{{m}^{3}}$ at a constant pressure of$100\text{ }N/{{m}^{2}}$. This unit is part of the Physics library. Process 1 is isobaric process, process 2 is isothermal and process is adiabatic. | Here, you can browse videos, articles, and exercises by topic. An ideal gas can be expanded from an initial state to a certain volume through two different processes, $P{{V}^{2}}=K$ and $P=K{{V}^{2}},$ where K is a positive constant. Heat required to change the temperature of a given gas at a constant pressure is different from that required to change the temperature of same gas through same amount at constant volume. Browse videos, articles, and exercises by topic. The value of $\frac{{{V}_{a}}}{{{V}_{c}}}$ will be, question_answer64) A diatomic ideal gas undergoes a thermodynamic change according to the P-V diagram shown in the figure. The volume of 1 g of steam is 1671 cc and the latent heat of evaporation is 540 cal. Media What is the work done by the system? If the tyre bursts suddenly at temperature 300 K, what will be the new temperature? The temperature of gas at c and d are 300 K and 500 K. calculate the heat absorbed by the gas during the process. The final volume of the gas is 2 liters. Notes | Purchase Courses If the pressure in the state B is ${{P}_{0}}/2$ then the pressure of the gas in state C is, Certain perfect gas is found to obey $P{{V}^{3/2}}=$ constant during an adiabatic process. question_answer50) If a given mass of an ideal gas followed a relation VT = constant during a process, then which of the following graphs correctly represents the process? OTP has been sent to your mobile number and is valid for one hour If during the adiabatic expansion part of the cycle, volume of the gas increases from V to 32 V, the efficiency of the engine is, question_answer70) A Carnot engine operating between temperatures ${{T}_{1}}$and ${{T}_{2}}$ has efficiency$\frac{1}{6}$. Choose the correct one, An insulated container of gas has two chambers separated by an insulating partition. Thermodynamics is the field of physics that successfully explains the properties of matter visible in our everyday, ... CliffsNotes study guides are written by real teachers and professors, so no matter what you're studying, CliffsNotes can ease your homework headaches and help you score high on exams. The branch of science called thermodynamics deals with systems that are able to transfer thermal energy into at least one other form of energy (mechanical, electrical, etc.) THERMODYNAMICS Syllabus : First law of thermodynamics and its â¦ In a thermodynamic process, pressure of a fixed mass of gas is changed in such a manner that the gas molecules gives out 30 joules of heat and 10 J of work is done on the gas. If the work done by the engine when it transfers heat from reservoir to sink is $12.6\times {{10}^{6}}J,$ the quantity of heat absorbed by the engine from the reservoir is. Its heat capacity for 2nd process is, Heat energy absorbed by a system in going through a cyclic process shown in the given figure is. The heat absorbed by the gas is-, During an isothermal expansion, a confined ideal gas does -150 J of work against its surroundings. question_answer21) Which of the following holds good for an isochoric process? Free Videos, Contact Us The relation between U, P and V for an ideal gas in an adiabatic process is given by relation $U=\text{ }a+bPV.$ Find the value of adiabatic exponent $\left( \gamma \right)$of this gas. The change in its internal energy is $({{C}_{v}}=10kJ/kg.K$and atm pressure $=1\times 105N/{{m}^{2}})$, question_answer24) When a system is taken a from state i to state f along the path iaf, it is found that $Q=50$cal and $W=20cal.$, Along the path ibf $Q=36$cal. Amazing Facts In the P-V diagram, I is the initial state and F is the final state. | Which of the following processes is irreversible? Learn thermodynamics physics with free interactive flashcards. Molar specific heat of the gas at constant volume is 3R/2. About If a given mass of an ideal gas followed a relation VT = constant during a process, then which of the following graphs correctly represents the process? Then the work done on the working substance is, A Carnot engine takes $3\times {{10}^{6}}cal.$ of heat from a reservoir at $\,627{}^\circ C,$and gives it to a sink at $27{}^\circ C.$ The work done by the engine is, A diatomic ideal gas is used in a car engine as the working substance. If the initial internal energy of the gas was 40 J, then final internal energy will be, question_answer49) Calculate the work done when 1 mole of a perfect gas is compressed adiabatically. Test Series question_answer44) A certain diatomic gas has the same specific heats as an ideal gas but a slightly different equation of state:$PV=R(T+\alpha {{T}^{2}}),$$\alpha =0.001{{K}^{-1}}.$The temperature of the gas is raised from ${{T}_{1}}=300K$to ${{T}_{2}}$ at constant pressure. The initial pressure and volume of the gas are ${{10}^{5}}N/{{m}^{2}}$ and 6 liter respectively. Then-, question_answer78) The P-V diagram of a gas system undergoing cyclic process is shown here. Free Videos, Contact Us question_answer6) A gas is compressed from a volume of $2{{m}^{3}}$ to a volume of $1{{m}^{3}}$ at a constant pressure of$100\text{ }N/{{m}^{2}}$. question_answer47) There are two processes ABC and DBF. The cycle consists of three steps: (i) an isothermal expansion $(a\to b),$ (ii) an isobaric compression $(b\to c),$ and (iii) a constant volume increases in pressure $(c\to a).$ If ${{T}_{a}}=400K,$ ${{P}_{a}}=4atm,$and ${{P}_{b}}={{P}_{c}},=1atm,$ the work done by the gas per cycle is, question_answer55) A 500 ml sealed cylinder contains nitrogen at a pressure of 1 atm. Sample Papers The values of x and n respectively are. The volume changes from $2\times {{10}^{-3}}{{m}^{3}}$ to $3.34{{m}^{3}}.$The work done by the system is about. The pressure-volume diagram shows six curved paths that can be followed by the gas (connected by vertical paths). Process 1 is isobaric process, process 2 is isothermal and process is adiabatic. Free Question Bank for JEE Main & Advanced Physics Thermodynamical Processes Self Evaluation Test - Thermodynamics FAQ If the work done by the engine when it transfers heat from reservoir to sink is $12.6\times {{10}^{6}}J,$ the quantity of heat absorbed by the engine from the reservoir is. | Starting with the same initial conditions, an ideal gas expands from volume ${{V}_{1}}$ to ${{V}_{2}}$ in three different ways. In the following P-V adiabatic cut two isothermals at temperatures ${{T}_{1}}$and ${{T}_{2}}$(fig). The work done in the process ABC is. | | Thermodynamics is a highly specialized area of physics that deals with the relationship between heat and energy. Solved Papers question_answer58) A Carnot engine works between a source and a sink maintained at constant temperatures ${{T}_{1}}$ and ${{T}_{2}}$, For efficiency to be the greatest. Its efficiency is, A Carnot engine whose efficiency is 50% has an exhaust temperature of 500 K. If the efficiency is to be 60% with the same intake temperature, the exhaust temperature must be (in K), For an ideal gas four processes are marked as 1, 2, 3 and 4 on P-V diagram as shown in figure. If ${{L}_{1}}$ and ${{L}_{2}}$ are the length of the gas column before and after expansion respectively, then $\frac{{{T}_{1}}}{{{T}_{2}}}$ is given by, question_answer38) One mole of an ideal gas is taken from state A to state B by three different processes, (i) ACB (ii) ADB (iii) AEB as shown in the P-V diagram. The work done by the system in the cycle is. | In which of the process is the amount of work done by the gas greater? Current Affairs | Jobs | An ideal gas is subjected to cyclic process involving four thermodynamic states, the amounts of heat (Q) and work (W) involved in each of these states ${{Q}_{1}}=6000J;{{Q}_{2}}=-5500J;{{Q}_{3}}=-3000J$ ${{Q}_{4}}=+\,3500J$ ${{W}_{1}}=2500J;{{W}_{2}}=-1000J;{{W}_{3}}=-1200J$ ${{W}_{4}}=xJ$ The ratio of the net work done by the gas to the total heat absorbed by the gas is $\eta$. 6 Diagnostic Tests 149 Practice Tests Question of the Day Flashcards Learn by â¦ question_answer87) A monoatomic ideal gas goes through a process $p={{p}_{0}}-\alpha V$ where ${{p}_{0}}$ and $\alpha$ are positive constants and V is its volume. The change in internal energy due to evaporation of 1 gm of water is. What is the work done by the system? First Law of Thermodynamics This law states that energy is conserved in a closed system. The same amount of heat is given to the gas in each cylinder. Choose the correct one, question_answer14) An insulated container of gas has two chambers separated by an insulating partition. (1) Heat $\mathbf{(\Delta Q)}$: It is the energy that is transferred between a system and its environment because of the temperature difference between them. CREATE AN ACCOUNT Create Tests & Flashcards. Why Studyadda? A tiny glass tube lies at the bottom of the cylinder. [Given ${{(3)}^{5/3}}=\text{ }6.19$]. Solved Papers Then. | | hi the second process, question_answer13) Some of the thermodynamic parameters are state variables while some are process variables. Home Embed All AP Physics 2 Resources . If the gas is taken from state A to B via process in which the net heat absorbed by the system is 12 cal, then the net work done by the system is $\left( 1\text{ }cal=4.19J \right)$, A Carnot engine is working between $127{}^\circ C$ and $27{}^\circ C.~$The increase in efficiency will be maximum when the temperature of, When 1 kg of ice at $0{}^\circ C$ melts to water at $0{}^\circ C,$the resulting change in its entropy, taking latent heat of ice to be 80 cal/${}^\circ C$, is, If the energy input to a Carnot engine is thrice the work it performs then, the fraction of energy rejected to the sink is, The efficiency of an ideal gas with adiabatic exponent $'\gamma '$ for the shown cyclic process would be, In a Carnot engine, the temperature of reservoir is $927{}^\circ C$ and that of sink is$27{}^\circ C$. question_answer41) One mole of an ideal gas goes from an initial stated to final state B via two processes: It first undergoes isothermal expansion from volume V to 3 V and then its volume is reduced from 3V to Fat constant pressure. Free Question Bank for JEE Main & Advanced Chemistry Thermodynamics If ${{L}_{1}}$ and ${{L}_{2}}$ are the length of the gas column before and after expansion respectively, then $\frac{{{T}_{1}}}{{{T}_{2}}}$ is given by, One mole of an ideal gas is taken from state A to state B by three different processes, (i) ACB (ii) ADB (iii) AEB as shown in the P-V diagram. Thermodynamics deals only with the large scale response of a system which we can observe and measure in experiments. | The work done by the system in the cycle is. Thermodynamics in physics follows the same basic principles, studying how thermal energy is converted into other different forms of energy. The change in the internal energy, Î U , of a system relates to energy, Q , in the form of heat, added to the system, and in the form of mechanical work, W , that leaves, or is done by the system. hi the second process, Some of the thermodynamic parameters are state variables while some are process variables. | https://www.studyadda.com Lalit Sardana Sir question_answer27) What will be the final pressure if an ideal gas in a cylinder is compressed adiabatically to $\frac{1}{3}rd$ of its volume? | Solved Problems on Thermodynamics:-Problem 1:-A container holds a mixture of three nonreacting gases: n 1 moles of the first gas with molar specific heat at constant volume C 1, and so on.Find the molar specific heat at constant volume of the mixture, in terms of the molar specific heats and quantitites of the three separate gases. Free Question Bank for 11th Class Physics Thermodynamical Processes Thermodynamics Conceptual Problems When ${{T}_{2}}$ is lowered by 62 K its efficiency increases to $\frac{1}{3}$. All the topics of Heat and Thermodynamics have been prepared in accordance with the elite exams like IIT JEE (Main and Advanced). | This implies that, A mass of diatomic gas $(\gamma =1.4)$at a pressure of 2 atmospheres is compressed adiabatically so that its temperature rises from $27{}^\circ C$ to $927{}^\circ C$. It is now transferred between the same two states in another process in which it absorbs ${{10}^{5}}J$ of heat. The work done in the process ABC is. Physics Notes , Physics Assignment , Physics Quiz , HC Verma Solution , NCERT Solution. This implies that, question_answer40) A mass of diatomic gas $(\gamma =1.4)$at a pressure of 2 atmospheres is compressed adiabatically so that its temperature rises from $27{}^\circ C$ to $927{}^\circ C$. Learn physics formulas thermodynamics conceptual with free interactive flashcards. The initial pressure and volume of the gas are ${{10}^{5}}N/{{m}^{2}}$ and 6 liter respectively. It is found that work done on the gas is 70% higher than what would be on an ideal gas. question_answer51) The state of an ideal gas is changed through an isothermal process at temperature ${{T}_{0}}$ as shown in figure. question_answer37) A monatomic ideal gas, initially at temperature ${{T}_{1}}$ is enclosed in a cylinder fitted with a frictionless piston. A tiny glass tube lies at the bottom of the cylinder. | View Study Package on Thermodynamics.pdf from PHYSICS 32003 at National University. Articles The gas goes from I to F by (i) IAF, (ii) IBF, (iii) ICE The heat absorbed by the gas is, question_answer29) A closed system undergoes a process $1\to 2$ for which the values ${{W}_{1-2}}$ and ${{Q}_{1-2}}$ are 50 kJ and - 20 kJ respectively. Its volume is 0.50 ml and it contains hydrogen at a pressure of 4.5 atm. Jobs Which two of them should be part of a closed cycle if the net work done by the gas is to be its maximum positive value? Articles | Ncert Solutions The heat absorbed by the gas is-, question_answer39) During an isothermal expansion, a confined ideal gas does -150 J of work against its surroundings. The same amount of heat is given to the gas in each cylinder. This unit is part of the Physics library. The laws of thermodynamics were developed over the years as some of the most fundamental rules which are followed when a thermodynamic system goes through some sort of energy change. If the system is returned to state 1 and ${{Q}_{1\to 2}}+10kJ$ the work done ${{W}_{1\to 2}}$is, question_answer30) During an adiabatic process of an ideal gas, if P is proportional to $\frac{1}{{{V}^{1.5}}}$, then the ratio of specific heat capacities at constant pressure to that at constant volume for the gas is. question_answer25) Choose the incorrect statement related to an isobaric process. The work done by the gas is ${{W}_{1}}$ if the process is purely isothermal, ${{W}_{2}}$ if purely isobaric and ${{W}_{3}}$ if purely adiabatic. Then. Amazing Facts The volume of 1 g of steam is 1671 cc and the latent heat of evaporation is 540 cal. Franchise The temperature of the gas is (use ln 9 = 2 and$R=\frac{25}{3}J/mol-K$), question_answer77) A gas is expanded from volume ${{V}_{0}}$ to $2{{V}_{0}}$ under three different processes. question_answer31) The relation between U, P and V for an ideal gas in an adiabatic process is given by relation $U=\text{ }a+bPV.$ Find the value of adiabatic exponent $\left( \gamma \right)$of this gas. Choose the correct statement(s). If the heating is done at constant pressure, the external work done by the gas is (${{C}_{p}}=0.219cal/g{}^\circ C$ and ), question_answer17) Two cylinders A and B fitted with pistons contain equal amounts of an ideal diatomic gas at 300 K. The piston of A is free to move while that of B is held fixed. Diagram of a system which we can observe thermodynamics study adda physics measure in experiments the process cylinder. Heat and thermodynamics have been prepared in accordance with the transfer of energy corresponding a! 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