Q286
Pick out the wrong statement.
A.
Surface tension of a substance vanishes at critical point, as there is no distinction between liquid and vapour phases at its critical point
B.
Entropy of a system decreases with the evolution of heat
C.
Change of internal energy is negative for exothermic reactions
D.
The accentric factor for all materials is always more than one
AnswerAnswer: Option D
Solution
Answer: Option D
Solution:
The acentric factor can’t always be greater than 1. For many monoatomic fluids the acentric factor is close to zero.