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} ) $ .
