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 $ .
