Redox Reactions And Electrochemistry Ques 173

Question: For the cell reaction $ C{u^{2+}}(C_1aq)+Zn(s)=Z{n^{2+}}(C_2aq)+Cu(s) $ of an electrochemical cell, the change in free energy at a given temperature is a function of [CBSE PMT 1998]

Options:

A) ln $ (C_1) $

B) ln $ (C_2) $

C) ln $ (C_1+C_2) $

D) ln $ (C_2/C_1) $

Show Answer

Answer:

Correct Answer: D

Solution:

$ E_{cell}=E_{cell}^{o}-\frac{RT}{nF}\ln \frac{C_2}{C_1} $ and $ \Delta G=-nF,{E_{cell}} $ hence $ \Delta G $ is the function of $ \ln ,( \frac{C_2}{C_1} ) $ .



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