Chemical Engineering Thermodynamics

Question: Cp of a gas at its critical temperature and pressure
[A].

becomes zero.

[B].

becomes infinity.

[C].

equals 1 kcal/kmol °K.

[D].

equals 0.24 kcal/kmol °K.

Answer: Option B

Explanation:

No answer description available for this question.

Question: At the critical point of a substance
[A].

the surface tension vanishes.

[B].

liquid and vapour have the same density.

[C].

there is no distinction between liquid and vapour phases.

[D].

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

Answer: Option D

Explanation:

No answer description available for this question.

Question: A gas can be liquified by pressure alone only, when its temperature is __________ its critical temperature.
[A].

less than

[B].

more than

[C].

equal to or higher than

[D].

less than or equal to

Answer: Option D

Explanation:

No answer description available for this question.

Question: Keeping the pressure constant, to double the volume of a given mass of an ideal gas at 27°C, the temperature should be raised to __________ °C.
[A].

270

[B].

327

[C].

300

[D].

540

Answer: Option B

Explanation:

No answer description available for this question.

Question: With increase in compression ratio, the efficiency of the otto engine
[A].

increases

[B].

decreases

[C].

remains constant

[D].

increases linearly

Answer: Option A

Explanation:

No answer description available for this question.

Question: A nozzle is a device, which
[A].

increases kinetic energy and decreases pressure.

[B].

reduces kinetic energy and increases pressure.

[C].

reduces both kinetic energy and pressure.

[D].

increases both kinetic energy and pressure.

Answer: Option A

Explanation:

No answer description available for this question.

Question: With increase in reduced temperature, the fugacity co-efficient of a gas at constant reduced pressure
[A].

increases

[B].

decreases

[C].

remains same

[D].

decreases linearly

Answer: Option A

Explanation:

No answer description available for this question.

Question: Gibbs-Duhem equation relates composition in liquid phase and the __________ at constant temperature & pressure.
[A].

fugacity

[B].

partial pressure

[C].

activity co-efficient

[D].

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

Answer: Option D

Explanation:

No answer description available for this question.

Question: In a turbine, the fluid expands almost
[A].

isothermally

[B].

isobarically

[C].

adiabatically

[D].

none of these

Answer: Option C

Explanation:

No answer description available for this question.

Question: In an ideal refrigeration cycle, the change in internal energy of the fluid is
[A].

+ve

[B].

-ve

[C].

0

[D].

either of the above three ; depends on the nature of refrigerant.

Answer: Option C

Explanation:

No answer description available for this question.