Thermodynamics
131 questions in this chapter, page 2 of 3.
Study loop for Thermodynamics
1. Practise the PYQsPrevious-year questions, with answers
Partial Molar Quantities
ABC26PH1517 · Molar composition of a mixture of P and Q at equilibrium is 3 : 1 (P : Q). A small disturbance in composition results in change of chemical… · DEC 2019
ABC26PH1523 · The change in chemical potential (in J) of one mole of an ideal gas, when it is compressed isothermally at 300 K from 1.0 atm to 2.0 atm… · DEC 2019
Phase Equilibria
ABC26PH1492 · Triple point pressure of substances A, B, C and D are 0.2, 0.5, 0.8 and 1.2 bar, respectively. The substance which sublimes under standard… · DEC 2016
Thermodynamics – General
ABC26PH0569 · In an adiabatic system, the work done to change its state from A to B is · 2005-2021 self-practice
ABC26PH0828 · A system undergoes two cyclic processes 1 and 2. Process 1 is reversible and process 2 is irreversible. The correct statement relating to… · 2001-2022 self-practice
ABC26PH0829 · For a cyclic process performed by an ideal gas, changes in some thermodynamic functions are zero. Indicate the set in which all the… · 2001-2022 self-practice
ABC26PH1448 · For a system of constant composition, the pressure (P) is given by. · DEC 2011
ABC26PH1449 · For the reaction C2H4(g) + 3O2(g) → 2CO2(g) + 2H2O(l), the value of Delta H - Delta U (in kJ) at 300 K and 1 bar is · DEC 2011
ABC26PH0573 · Delta S0univ for the following reaction, at 298 K is: N2 + 3H2 → 2NH3 Delta S0sys = -197 J K-1, Delta H0sys = -91.8 kJ · 2005-2021 self-practice
ABC26PH0834 · The molar internal energy of a gas at temperature T is Um(T). The molar internal energy at T = 0 is Um(0). The correct expression that… · 2001-2022 self-practice
ABC26PH1453 · The vapour of a pure substance, when cooled under a pressure less than its triple-point pressure, · JUNE 2012
ABC26PH1454 · The quantities, which are held fixed in a canonical ensemble are · JUNE 2012
ABC26PH0836 · The work done during the free expansion of one mole of an ideal gas at 27^ to twice its original volume is (given : RT = 2494 J mol-1, ln 2… · 2001-2022 self-practice
ABC26PH1455 · An ideal gas was subjected to a reversible, adiabatic, expansion and then its initial volume was restored by a reversible, isothermal… · JUNE 2012
ABC26PH1457 · A carnot takes up 90 J of heat from the source kept at 300K. The correct statement among the following is · DEC 2012
ABC26PH0582 · If a gas obeys the equation of state P(V - nb) = nRT, the ratio ((CP - CV))/((CP - CV)ideal) is: · 2005-2021
ABC26PH0840 · (a) One mole of an ideal gas initially at 300 K and at a pressure of 10 atm undergoes adiabatic expansion. (i) Reversibly and (ii)… · 2001-2022 self-practice
ABC26PH0231 · The internal pressure (∂ U/∂ V)T of a real gas is related to the compressibility factor Z = pV/RT by [where, V is the molar volume] · DEC 2012 self-practice
ABC26PH1459 · The internal pressure (∂ U/∂ V)T of a real gas is related to the compressibility factor Z = pV/RT by [where, V is the molar volume] · DEC 2012
ABC26PH1460 · The lowest pressure at which the liquid phase of a pure substance can exist is known as · JUNE 2013
ABC26PH0845 · The change in entropy for the following transformations is respectively: (+ indicates increase, - indicates decrease and 0 indicates no… · 2001-2022 self-practice
ABC26PH1462 · Which of the following statements is true for a cyclic process? · JUNE 2013
ABC26PH1463 · The correct thermodynamics relation among the following is · DEC 2013
ABC26PH0847 · Which of the following thermodynamic relation(s) is/are correct? · 2001-2022 self-practice
ABC26PH1464 · The heat capacity of 10 mol of an ideal gas at a certain temperature is 300 JK-1 at constant pressure. The heat capacity of the same gas at… · DEC 2013
ABC26PH0591 · At any temperature T, fugacity coefficient (gamma) is given by ln gamma =∫0P(Z-1)/(P') dP' where Z is the compressibility factor. The… · 2005-2021
ABC26PH0848 · Two moles of an ideal gas is expanded isothermally and reversibly from 5 to 1 bar at 298 K. The change in the entropy (in J K-1) of the… · 2001-2022 self-practice
ABC26PH0233 · Work (w) involved in isothermal reversible expansion from Vi to Vf of n moles of an ideal gas is · DEC 2013 self-practice
ABC26PH0849 · The enthalpy of formation for CH4(g), C(g) and H(g) are –75, 717 and 218 kJ mol-1, respectively. The enthalpy of the C – H bond in kJ mol-1… · 2001-2022 self-practice
ABC26PH1467 · Work (w) involved in isothermal reversible expansion from Vi to Vf of n moles of an ideal gas is · DEC 2013
ABC26PH0592 · ((∂ G)/(∂ P))T = · 2005-2021
ABC26PH1469 · The figure below represents the path followed by a gas during expansion from A → B. The work done is (L atm) · JUNE 2014
ABC26PH0235 · Two phases alpha and beta of a species are in equilibrium. The correct relations observed among the variables, T, p and mu are · JUNE 2014
ABC26PH1470 · Two phases alpha and beta of a species are in equilibrium. The correct relations observed among the variables, T, p and mu are · JUNE 2014
ABC26PH0853 · At 298 K and 1 atm, the molar enthalpies of combustion of cyclopropane and propene are -2091 kJ mol-1 and -2058 kJ mol-1, respectively. The… · 2001-2022 self-practice
ABC26PH0596 · The maximum non-PV work that a system can perform at constant P is · 2005-2021
ABC26PH0854 · Consider an isothermal reversible compression of one mole of an ideal gas in which the pressure of the system is increased from 5 atm to 30… · 2001-2022 self-practice
ABC26PH1472 · The number of phases, components and degrees of freedom, when Ar is added to an equilibrium mixture of NO, O2 and NO2 in gas phase are… · JUNE 2014
ABC26PH0855 · The correct expression(s) for isothermal expansion of 1 mol of an ideal gas is(are) · 2001-2022 self-practice
ABC26PH1473 · For a process in a closed system, temperature is equal to · DEC 2014
ABC26PH0598 · A Carnot engine operates at 55% efficiency. If the temperature of reject steam is 105°C, then the absolute temperature of input steam is… · 2005-2021 self-practice
ABC26PH0856 · The value of Cv for 1 mol of N2 gas predicted from the principle of equipartition of energy, ignoring vibrational contribution, is ______ J… · 2001-2022 self-practice
ABC26PH0599 · 33.2 kJ mol-1, the enthalpy change for the reaction 2NO(g)+O2(g)(g)→ 2NP2(g) is · 2005-2021
ABC26PH1475 · Given the following two relations, x1 d mu 1 + x2 d mu 2 = 0 And x1 dV1 + x2 dV2 = 0 for a binary liquid mixture at constant temperature… · DEC 2014
ABC26PH0600 · Which one of the following defines the absolute temperature of a system? · 2005-2021
ABC26PH1476 · At high pressure, the fugacity coefficient of a real gas is greater than one, because · DEC 2014