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Question

Chemistry Question on Electrochemistry

According to the expression ΔG=nFE\Delta G^{\circ} = -nFE^{\circ} , the cell reaction is spontaneous when (Notations and symbols carry their usual meanings)

A

ΔG\Delta G^{\circ} is positive

B

ΔG\Delta G^{\circ} is zero

C

EE^{\circ} is negative

D

EE^{\circ} is positive

Answer

EE^{\circ} is positive

Explanation

Solution

For a spontaneous process, Gibb?s free energy change must be negative, so EE^{\circ} should be positive