Question
Chemistry Question on Electrochemical Cells
Cell reaction is spontaneous, when
A
Ered∘ is negative
B
Ered∘ is positive
C
ΔG∘ is negative
D
ΔG∘ is positive
Answer
ΔG∘ is negative
Explanation
Solution
ΔG=ΔH−TΔS
For a spontaneous celll reaction, ΔH should be negative and ΔS should be positive. Hence, ΔG should be negative.