Thermodynamics
159 questions in this chapter, page 2 of 4.
Study loop for Thermodynamics
1. Practise the PYQsPrevious-year questions, with answers
Laws State Functions
ABC26PH1516 · Consider the entropy changes in a system undergoing transformation, as depicted in the diagram, below The correct statement among the… · DEC 2019
ABC26PH0256 · The excess molar entropy of mixing of liquid A with liquid B is -Rln 2. The experimentally observed change in entropy upon mixing 1.0 mol… · DEC 2019
ABC26PH1522 · The excess molar entropy of mixing of liquid A with liquid B is -Rln 2. The experimentally observed change in entropy upon mixing 1.0 mol… · DEC 2019
ABC26PH1525 · When yellow phosphorous is converted to red phosphorous, the entropy and volume of the system do not change. The order of this phase… · JUNE 2021
Partial Molar Quantities
ABC26PH1447 · The chemical potential of component 1 in a solution of binary mixture is mu 1 = mu 10 + RTln p1, when p1 is the partial pressure of… · JUNE 2011
ABC26PH0576 · The expression which represents the chemical potential of the ith sp species (mu i) in a mixture (i ≠ j) is · 2005-2021 self-practice
ABC26PH0232 · The chemical potential (mu i) of the ith component is defined as · DEC 2013
ABC26PH1466 · The chemical potential (mu i) of the ith component is defined as · DEC 2013
ABC26PH1479 · A thermodynamic equation that relates the chemical potential to the composition of a mixture is known as · JUNE 2015
ABC26PH0251 · The chemical potential (mu) of a 2 molar Na2SO4 solution is expressed in terms of mean ionic activity co-efficient (gamma _±) as · JUNE 2019
ABC26PH1515 · The chemical potential (mu) of a 2 molar Na2SO4 solution is expressed in terms of mean ionic activity co-efficient (gamma _±) as · JUNE 2019
ABC26PH0253 · 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
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
ABC26PH1488 · Phase diagram of a compound is shown below The slopes of the lines OA, AC and AB are tan (pi)/4, tan (pi)/6 and tan (pi)/3 respectively. If… · JUNE 2016
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
ABC26PH1496 · A one-component system with the associated phase diagram (see the figure) is not possible because · JUNE 2017
Thermochemistry
ABC26PH0578 · The specific volume of liquid water is 1.001 mL g-1 and that of ice is 1.0907 mL g-1 at ° C. If the heat of fusion of ice at this… · 2005-2021
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
ABC26PH0228 · The vapour of a pure substance, when cooled under a pressure less than its triple-piont pressure, · JUNE 2012 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
ABC26PH0838 · One mole of a van der waals gas undergoes reversible isothermal transformation from an initial volume V1 to a final volume V2. The… · 2001-2022 self-practice
ABC26PH0230 · A carnot takes up 90 J of heat from the source kept at 300K. The correct statement among the following is · DEC 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
ABC26PH0583 · Among the following the system that would require the least amount of thermal energy to bring its temperature to 80°C. · 2005-2021 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
ABC26PH0842 · The standard enthalpy of formation (Delta f H3000) at 1 bar and 300 K for the formation of CF2 ClCF2 Cl(g) from its constituent elements in… · 2001-2022 self-practice
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
ABC26PH0846 · For an isothermal free expansion of an ideal gas into vaccum, which one of the following set of values is correct? · 2001-2022 self-practice
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