AIEEE 2004 | Thermodynamics Question 171 | Chemistry

The enthalpies of combustion of carbon and carbon monoxide are -393.5 and -283 kJ mol-1 respectively. The enthalpy of formation of carbon monoxide per mole is :

110.5 kJ

-110.5 kJ

-676.5 kJ

676.5 kJ

AIEEE 2003

MCQ (Single Correct Answer)

-1

The internal energy change when a system goes from state A to B is 40 kJ/mole. If the system goes from A to B by a reversible path and returns to state A by an irreversible path what would be the net change in internal energy?

> 40 kJ

< 40 kJ

Zero

40 kJ

AIEEE 2003

MCQ (Single Correct Answer)

-1

In an irreversible process taking place at constant T and P and in which only pressure-volume work is being done, the change in Gibbs free energy (dG) and change in entropy (dS), satisfy the criteria :

(dS)_{V, E} > 0, (dG)_{T, P} < 0

(dS)_{V, E} = 0, (dG)_{T, P} = 0

(dS)_{V, E} = 0, (dG)_{T, P} > 0

(dS)_{V, E} < 0, (dG)_{T, P} < 0

AIEEE 2003

MCQ (Single Correct Answer)

-1

The enthalpy change for a reaction does not depend upon :

use of different reactants for the same product

the nature of intermediate reaction steps

the differences in initial or final temperature of involved substances

the physical states of reactants and products