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Chemical Engineering - Chemical Engineering Thermodynamics

Exercise : Chemical Engineering Thermodynamics - Section 1
26.
"At the absolute zero temperature, the entropy of every perfectly crystalline substance becomes zero". This follows from the
third law of thermodynamics
second law of thermodynamics
Nernst heat theorem
Maxwell's relations
Answer: Option
Explanation:
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27.
During Joule-Thomson expansion of gases
enthalpy remains constant.
entropy remains constant.
temperature remains constant.
none of these.
Answer: Option
Explanation:
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28.
The accentric factor of a materical, 'ω', is defined as ω = -log10(Prsat)Tr-1 = 0.7, where, Prsat = reduced vapor pressure, Tr = reduced temperature. The value of accentric factor is always
> 2
< 1
> 1
< 3
Answer: Option
Explanation:
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29.
Degress of freedom at triple point will be
0
1
2
3
Answer: Option
Explanation:
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30.
"Law of corresponding states" says that
, two different gases behave similarly, if their reduced properties (i.e. P, V and T) are same.
the surface of separation (i. e. the meniscus) between liquid and vapour phase disappears at the critical temperature.
no gas can be liquified above the critical temperature, howsoever high the pressure may be.
the molar heat of energy of gas at constant volume should be nearly constant (about 3 calories).
Answer: Option
Explanation:
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