Chemical Engineering Thermodynamics

Question: In a homogeneous solution, the activity co-efficient of a component depends upon the
[A].

pressure

[B].

composition

[C].

temperature

[D].

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

Answer: Option D

Explanation:

No answer description available for this question.

Question: During a reversible isothermal expansion of an ideal gas, the entropy change is
[A].

+ve

[B].

0

[C].

-ve

[D].

∞

Answer: Option A

Explanation:

No answer description available for this question.

Question: In the equation, PVn = constant, if the value of n = ± ∞, then it represents a reversible __________ process.
[A].

adiabatic

[B].

isometric

[C].

isentropic

[D].

isothermal

Answer: Option B

Explanation:

No answer description available for this question.

Question: Linde gas liquefaction process employs cooling
[A].

by throttling

[B].

by expansion in an engine

[C].

at constant pressure

[D].

none of these

Answer: Option A

Explanation:

No answer description available for this question.

Question: Boiling of liquid is accompanied with increase in the
[A].

vapor pressure.

[B].

specific Gibbs free energy.

[C].

specific entropy.

[D].

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

Answer: Option A

Explanation:

No answer description available for this question.

Question: With increase in temperature, the internal energy of a substance
[A].

increases

[B].

decreases

[C].

remains unchanged

[D].

may increase or decrease; depends on the substance

Answer: Option A

Explanation:

No answer description available for this question.

Question: Compressibility factor for almost all the gases are approximately same at the same
[A].

pressure and temperature.

[B].

reduced pressure and reduced temperature.

[C].

critical pressure and critical temperature.

[D].

none of these.

Answer: Option B

Explanation:

No answer description available for this question.

Question: In the equation PVn = constant, if the value of n = y = Cp/Cv, then it represents a reversible __________ process.
[A].

isothermal

[B].

adiabatic

[C].

isentropic

[D].

polytropic

Answer: Option C

Explanation:

No answer description available for this question.

Question: A two stage compressor is used to compress an ideal gas. The gas is cooled to the initial temperature after each stage. The intermediate pressure for the minimum total work requirement should be equal to the __________ mean of P1 and P2.(where, P1 and P2 are initial and final pressures respectively)
[A].

logarithmic

[B].

arithmetic

[C].

geometric

[D].

harmonic

Answer: Option C

Explanation:

No answer description available for this question.

Question: Claude gas liquefaction process employs cooling
[A].

at constant pressure.

[B].

by throttling.

[C].

by expansion in an engine.

[D].

none of these.

Answer: Option C

Explanation:

No answer description available for this question.