For ΔG° < 0 (spontaneous), E° must be:
APositive
BVariable
CZero
DNegative
Answer & Solution
Correct answer: A. Positive
ΔG° = -nFE°. For ΔG° < 0 (spontaneous), we need -nFE° < 0, so E° > 0. Positive cell potential indicates spontaneous galvanic cell.
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