alleryFor an electrochemical cell operating spontaneously, ΔG° is related to E°_cell by
AΔG° = +nFE°_cell
BΔG° = nF / E°_cell
CΔG° = −nFE°_cell
DΔG° = E°_cell / (nF)
Answer & Solution
Correct answer: C. ΔG° = −nFE°_cell
1. Standard cell thermodynamics: ΔG° = −nFE°_cell.
2. Positive E°_cell → negative ΔG° → spontaneous.
3. n is moles of electrons transferred; F is Faraday constant.
4. At non-standard conditions, ΔG = ΔG° + RT ln Q or equivalently ΔG = −nFE_cell.
_Source: syllabus Chemistry, Unit 3 "Electrochemistry", §3.3_
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