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Chemical Engineering - Chemical Engineering Thermodynamics - Discussion

Discussion Forum : Chemical Engineering Thermodynamics - Section 4 (Q.No. 15)
Chemical Engineering Thermodynamics
15.
Pick out the wrong statement.
Surface tension of a substance vanishes at critical point, as there is no distinction between liquid and vapour phases at its critical point.
Entropy of a system decreases with the evolution of heat.
Change of internal energy is negative for exothermic reactions.
The accentric factor for all materials is always more than one.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
2 comments Page 1 of 1.
Chayanika said:   5 months ago
I think Options B and D are wrong.

The evolution of heat means disoderness which increases the entropy.
Vairamani said:   2 years ago
The acentric factor can’t always be greater than 1.

For many monoatomic fluids, the acentric factor is close to zero.
(2)
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