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Chemical Engineering - Chemical Engineering Thermodynamics

Exercise : Chemical Engineering Thermodynamics - Section 2
6.
What is the value of ln y (where y = activity co-efficient) for ideal gases ?
Zero
Unity
Infinity
Negative
Answer: Option
Explanation:
No answer description is available. Let's discuss.
7.
A closed system is cooled reversibly from 100°C to 50°C. If no work is done on the system
its internal energy (U) decreases and its entropy (S) increases.
U and S both decreases
U decreases but S is constant.
U is constant but S decreases.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
8.
Which is not a refrigerant ?
SO2
NH3
CCl2F2
C2H4Cl2
Answer: Option
Explanation:
No answer description is available. Let's discuss.
9.
The partial pressure of each constituent present in an alloy is __________ the total vapor pressure exerted by the alloy.
less than
equal to
more than
either (b) or (c); depends on the type of alloy
Answer: Option
Explanation:
No answer description is available. Let's discuss.
10.
Heat is added at constant pressure in an ideal __________ cycle.
Stirling
Brayton
Rankine
both (b) and (c)
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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