Chemical Engineering - Chemical Engineering Thermodynamics

1. 

Ideal gas law is applicable at

A. low T, low P
B. high T, high P
C. low T, high P
D. high T, low P

Answer: Option D

Explanation:

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2. 

Reduced pressure of a gas is the ratio of its

A. pressure to critical pressure.
B. critical pressure to pressure.
C. pressure to pseudocritical pressure.
D. pseudocritical pressure to pressure.

Answer: Option A

Explanation:

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3. 

For a reversible process involving only pressure-volume work

A. (dF)T, p < 0
B. (dF)T, p > 0
C. (dF)T, p = 0
D. (dA)T, v < 0

Answer: Option C

Explanation:

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4. 

Air enters an adiabatic compressor at 300K. The exit temperature for a compression ratio of 3, assuming air to be an ideal gas (Y = Cp/Cv = 7/5) and the process to be reversible, is

A. 300(32/7)
B. 300(33/5)
C. 300(333/7)
D. 300(35/7)

Answer: Option A

Explanation:

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5. 

Entropy change for an irreversible process taking system and surrounding together is

A. 0
B. > 0
C. < 0
D. none of these

Answer: Option B

Explanation:

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