ABC26PH1459 · The internal pressure ( U / V)T of a real gas is related to the compressibility factor Z=p V / 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
ABC26PH1462 · Which of the following statements is true for a cyclic process? · JUNE 2013
ABC26PH0588 · For an ideal gas · 2005-2021self-practice
ABC26PH1463 · The correct thermodynamics relation among the following is · DEC 2013
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
ABC26PH1465 · The Maxwell's relationship derived from the equation dG=VdP-SdT is · DEC 2013
ABC26PH0591 · At any temperature T, fugacity coefficient ( gamma ) is given by gamma =0P Z-1P dP where Z is the compressibility factor. The fugacity… · 2005-2021
ABC26PH0233 · Work (w) involved in isothermal reversible expansion from Vi to Vf of n moles of an ideal gas is · DEC 2013self-practice
ABC26PH1467 · Work (w) involved in isothermal reversible expansion from Vi to Vf of n moles of an ideal gas is · DEC 2013
ABC26PH0234 · The figure below represents the path followed by a gas during expansion from A B. The work done is (L atm) · JUNE 2014
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
ABC26PH0596 · The maximum non-PV work that a system can perform at constant P is · 2005-2021
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
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… · 2005-2021self-practice
ABC26PH0599 · Given that the standard molar enthalpies of formation of NO(g) and NO2(g) are, respectively, 90.3\ kJ\,mol-1 and 33.2\ kJ\,mol-1, the… · 2005-2021
ABC26PH1475 · Given the following two relations, x1 d 1+x2 d 2=0 And x1 d V1+x2 d V2=0 for a binary liquid mixture at constant temperature and pressure… · 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
ABC26PH1477 · Heat capacity of a species is independent of temperature if it is · JUNE 2015
ABC26PH1478 · Consider the progress of a system along the path shown in the figure Delta S(B C) for one mole of an ideal gas is then given by · JUNE 2015
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)… · 2005-2021self-practice
ABC26PH1480 · The value of Delta U- Delta H for the reaction Fe2 O3(s)+3 C(s) 2 Fe(s)+3 CO(g) is · DEC 2015
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 300 K . 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 p=10.0-1800/T, and that of liquid A by p=8.0-1400/T… · DEC 2015
ABC26PH1484 · The temperature-dependence of the vapour pressure of solid A can be represented by p=10.0-1800/T, and that of liquid A by p=8.0=-1400 / T… · 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… · 2005-2021self-practice
ABC26PH0240 · The figure below describes how a Carnot engine works. It starts from the adiabatic compression step denoted by · JUNE 2016self-practice
ABC26PH1489 · The figure below describes how a Carnot engine works. It starts from the adiabatic compression step denoted by · JUNE 2016
ABC26PH0241 · If U is a function of V and T, (( U)/( T) )P is equal to ( pi and alpha are the internal pressure and the coefficient of thermal expansion… · JUNE 2016
ABC26PH1490 · If U is a function of V and T, (( U)/( T) )P is equal to ( pi and alpha are the internal pressure and the coefficient of thermal expansion… · JUNE 2016
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… · 2005-2021self-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… · 2005-2021self-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… · 2005-2021self-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… · 2005-2021self-practice