Which relationship correctly connects the standard cell potential (E°cell) to the standard Gibbs free energy change (ΔG°)?
Answer and explanation
Correct answer: C. ΔG° = -n F E°cell
The maximum electrical work obtainable from a reversible electrochemical cell equals the decrease in Gibbs free energy: w_elec = -ΔG°. Since w_elec = q E = n F * E°cell, the relationship is ΔG° = -n F E°cell, where n is the number of moles of electrons transferred and F is the Faraday constant (96,485 C/mol).
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