Gibbs free energy of mixing at constant pressure and temperature is...

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Gibbs free energy of mixing at constant pressure and temperature is always

A. 0

B. $$\infty $$

C. +ve

D. -ve

Answer: Option D

Solution(By Examveda Team)

Change of Gibbs free energy due to mixing is given as $$\Delta {G_{mix}} = RT\sum {} xlnx$$ since mole fraction is always less than one we can say the change due to mixing is negative.

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