Chemical Engineering Thermodynamics

Question: Free energy, fugacity and activity co-efficient are all affected by change in the temperature. The fugacity co-efficient of a gas at constant pressure ____with the increase of reduced temperature.
[A].

decreases

[B].

increases

[C].

remains constant

[D].

decreases logarithmically

Answer: Option B

Explanation:

No answer description available for this question.

Question: Melting of ice is an example of an __________ process.
[A].

adiabatic

[B].

isothermal

[C].

isometric

[D].

none of these

Answer: Option B

Explanation:

No answer description available for this question.

Question: Melting of ice exemplifies a/an
[A].

adiabatic process.

[B].

endothermic reaction.

[C].

exothermic reaction.

[D].

process involving a chemical reaction.

Answer: Option B

Explanation:

No answer description available for this question.

Question: An isentropic process is carried out at constant
[A].

volume

[B].

pressure

[C].

temperature

[D].

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

Answer: Option A

Explanation:

No answer description available for this question.

Question: Joule-Thomson effect i.e., a throttling process is a constant __________ process.
[A].

entropy

[B].

temperature

[C].

internal energy

[D].

enthalpy

Answer: Option D

Explanation:

No answer description available for this question.

Question: Compressibility factor (i.e., the ratio of actual volume of gas to the volume predicted by ideal gas law) for all gases are
[A].

always greater than one.

[B].

same at the same reduced temperature.

[C].

same at the same reduced pressure.

[D].

both(b) & (c).

Answer: Option D

Explanation:

No answer description available for this question.

Question: Minimum number of phases that exists in a system is 1. Number of chemical species in a colloidal system is
[A].

1

[B].

4

[C].

2

[D].

3

Answer: Option C

Explanation:

No answer description available for this question.

Question: Entropy of the system decreases, when
[A].

snow melts into water.

[B].

a gas expands spontaneously from high pressure to low pressure.

[C].

water is converted into ice.

[D].

both (b) & (c).

Answer: Option D

Explanation:

No answer description available for this question.

Question: Absorption/evolution of heat during conversion of a substance from one allotropic form to another is termed as the heat of
[A].

sublimation

[B].

fusion

[C].

transition

[D].

vaporisation

Answer: Option C

Explanation:

No answer description available for this question.

Question: Joule-Thomson co-efficient which is defined as, , changes sign at a temperature known as inversion temperature. The value of Joule-Thomson co-efficient at inversion temperature is
[A].

0

[B].

∞

[C].

+ve

[D].

-ve

Answer: Option A

Explanation:

No answer description available for this question.