Question: Gibbs free energy (G) is represented by, G = H – TS, whereas Helmholtz free energy, (A) is given by, A = E – TS. Which of the following is the Gibbs-Helmholtz equation
[A].

[B].

[C].

both (a) and (b)

[D].

neither (a) nor (b)

Answer: Option C

Explanation:

No answer description available for this question.

Question: At equilibrium condition, the chemical potential of a material in different phases in contact with each other is equal. The chemical potential for a real gas (μ) is given by(where, μ = standard chemical potential at unit fugacity (f° = 1 atm.) and the gas behaves ideally.)
[A].

μ° + RT ln f

[B].

μ°+ R lnf

[C].

μ° + T lnf

[D].

μ° + R/T lnf

Answer: Option A

Explanation:

No answer description available for this question.

Question: Gibbs free energy per mole for a pure substance is equal to the
[A].

latent heat of vaporisation

[B].

chemical potential

[C].

molal boiling point

[D].

heat capacity

Answer: Option B

Explanation:

No answer description available for this question.

Question: Clausius – Clayperon equation is applicable to __________ equilibrium processes.
[A].

solid-vapor

[B].

solid-liquid

[C].

liquid-vapor

[D].

all (a), (b) and (c)

Answer: Option D

Explanation:

No answer description available for this question.

Question: dW and dq are not the exact differential, because q and W are
[A].

state functions

[B].

path functions

[C].

intensive properties

[D].

extensive properties

Answer: Option B

Explanation:

No answer description available for this question.

Question: Heat is added at constant temperature in an ideal __________ cycle.
[A].

Stirling

[B].

Brayton

[C].

Rankine

[D].

none of these

Answer: Option A

Explanation:

No answer description available for this question.

Question: Heat is added at constant pressure in an ideal __________ cycle.
[A].

Stirling

[B].

Brayton

[C].

Rankine

[D].

both (b) and (c)

Answer: Option D

Explanation:

No answer description available for this question.

Question: __________ decreases during adiabatic throttling of a perfect gas.
[A].

Entropy

[B].

Temperature

[C].

Enthalpy

[D].

Pressure

Answer: Option D

Explanation:

No answer description available for this question.

Question: In an ideal gas mixture, fugacity of a species is equal to its
[A].

vapor pressure

[B].

partial pressure

[C].

chemical potential

[D].

none of these

Answer: Option B

Explanation:

No answer description available for this question.

Question: A system is said to be at equilibrium, if the entropy of the system has reached __________ value.
[A].

minimum

[B].

zero

[C].

maximum

[D].

none of these

Answer: Option C

Explanation:

No answer description available for this question.