Thermodynamics
159 questions in this chapter, page 3 of 4.
Study loop for Thermodynamics
1. Practise the PYQsPrevious-year questions, with answers
Thermodynamics – General
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
ABC26PH0594 · For the reaction X2 O4() → 2 XO2(g) at 298 K, given the values, Delta U=9 kJ and Delta S=84 JK-1, Delta G is · 2005-2021
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
ABC26PH0858 · The thermodynamic criterion for spontaneity of a process in a system under constant volume and temperature and in the absence of any work… · 2001-2022 self-practice
ABC26PH1477 · Heat capacity of a species is independent of temperature if it is · JUNE 2015
ABC26PH0859 · One mole of an ideal gas is subjected to an isothermal increase in pressure from 100 kPa to 1000 kPa at 300 K. The change in Gibbs free… · 2001-2022 self-practice
ABC26PH0604 · Of the following inequalities, the criteria for spontaneity of a chemical reaction is/are (i) (Delta G)T,P < 0 (ii) (Delta U)S,V > 0 (iii)… · 2005-2021 self-practice
ABC26PH1480 · The value of Delta U - Delta H for the reaction Fe2O3(s) + 3C(s) → 2Fe(s) + 3CO(g) is · DEC 2015
ABC26PH0864 · The standard Gibbs free energy change for the reaction H2O(g) → H2(g) + 1/2O2(g) at 2500 K is +118 kJ mol-1. The equilibrium constant for… · 2001-2022 self-practice
ABC26PH1482 · Delta H of a reaction is equal to slope of the plot of · DEC 2015
ABC26PH0237 · A reversible expansion of 1.0 mol of an ideal gas is carried out from 1.0 L to 4.0 L under isothermal condition at 300K. Delta G for this… · DEC 2015
ABC26PH1483 · A reversible expansion of 1.0 mol of an ideal gas is carried out from 1.0 L to 4.0 L under isothermal condition at 300 K. Delta G for this… · DEC 2015
ABC26PH0238 · The temperature-dependence of the vapour pressurse of solid A can be represented by log p=10.0-1800/T, and that of liquid A by log… · DEC 2015
ABC26PH1486 · ((∂ H)/(∂ P))T has the dimension of · JUNE 2016
ABC26PH1487 · For an ideal gas at 300 K · JUNE 2016
ABC26PH0613 · An ideal gas occupies an unknown volume V liters (L) at a pressure of 12 atm. The gas is expanded isothermally against a constant external… · 2005-2021 self-practice
ABC26PH0616 · Delta Gf0 and Delta Hf0 for Fe(g) are 370.7 kJ mol-1 and 416.3 kJ mol-1 at 298 K, respectively. Assuming Delta Hf0 is constant in the… · 2005-2021 self-practice
ABC26PH0617 · The van der Waals constants a and b for gaseous CO are given as 1.49 L2 atm mol-2 and 0.0399 L mol-1, respectively. The fugacity (in atm… · 2005-2021 self-practice
ABC26PH0242 · The equation of state for one mole of a gas is given by P(V - b) = RT, where b and R are constants. The value of ((∂ H)/(∂ P))T is · DEC 2016
ABC26PH0618 · A reversible heat engine absorbs 20 kJ of heat from a source at 500 K and dissipates it to the reservoir at 400 K. The efficiency of the… · 2005-2021 self-practice
ABC26PH1493 · The equation of state for one mole of a gas is given by PV-b=RT, where b and R are constants. The value of ((∂ H)/(∂ P))T is · DEC 2016
ABC26PH0619 · 2L of gas at 1 atm pressure is reversibly heated to reach a final volume of 3.5 L. The absolute value of the work done on the gas (rounded… · 2005-2021 self-practice
ABC26PH1495 · The partial derivative ((∂ T)/(∂ V))P is equal to · DEC 2016
ABC26PH1497 · A phase transition process is always · JUNE 2017
ABC26PH0243 · The correct statement for any cyclic thermodynamic process is · JUNE 2017
ABC26PH1498 · The correct statement for any cyclic thermodynamic process is · JUNE 2017
ABC26PH1499 · The fugacity of a real gas is less than the pressure (P) of an ideal gas at the same temperature (T) only when (Tb is the Boyle temperature… · JUNE 2017
ABC26PH1500 · The minimum work required by an engine to transfer 5 J of heat from a reservoir at 100 K to one at 300 K is · JUNE 2017