Chemical Thermodynamics Question 326

Question: In an irreversible process taking place at constant P and T in which only pressure-volume work is being done by the system, the change in Gibbs energy (dG) and change in entropy (dS) satisfy the criterion

Options:

A) $ {{(dS)} _{v,u}}=0,,{{(dG)} _{T,P}}=0 $

B) $ {{(dS)} _{v,u}}=0,,{{(dG)} _{T,P}}=+ve $

C) $ {{(dS)} _{v,u}}=-ve,,{{(dG)} _{T,P}}=-ve $

D) $ {{(dS)} _{v,u}}=+ve,,{{(dG)} _{T,P}}=-ve $

Show Answer

Answer:

Correct Answer: D

Solution:

  • for a spontaneous change (work is being done by the system) $ {{(dG)} _{T,P}}=-ve $ and $ {{(dS)} _{V,U}}=+ve $


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