Redox Reactions And Electrochemistry Ques 163

Question: Calculate standard free energy change for the reaction $ \frac{1}{2}Cu(s)+\frac{1}{2}Cl_2(g) $ ⇌ $ \frac{1}{2}C{u^{2+}}+C{l^{-}} $ taking place at $ 25^{o}C $ in a cell whose standard e.m.f. is 1.02 volts [MP PMT 1997]

Options:

A) - 98430 J

B) 98430 J

C) 96500 J

D) - 49215 J

Show Answer

Answer:

Correct Answer: A

Solution:

$ \Delta G=-nFE^{o} $ $ \Delta G=-1\times 96500\times 1.02 $ ; $ \Delta G=-98430 $ .



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