Cell Potential and Free Energy

AP Chemistry· difficulty 3/5

The relationship between standard free energy and cell potential is shown.

A galvanic cell has E°cell = +1.10 V and n = 2. What is the sign of ΔG°?

A
$Negative; the cell reaction is spontaneous$
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B
$Cannot be determined without T$
C
$Positive; the cell reaction is non-spontaneous$
D
$Zero; system is at equilibrium$

Explanation

ΔG° = -nFE°cell. With n=2 and E° positive, ΔG° is negative, indicating spontaneity.

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