The theoretical efficiency of the fuel cell is given by — Electrochemistry Chemistry Question

💡 Solution & Explanation

The theoretical thermodynamic efficiency of a fuel cell is defined as the ratio of maximum useful electrical work to the enthalpy of combustion: Efficiency = (ΔG° / ΔH°) × 100%. Substituting the given values: Efficiency = (-237.39 / -285.8) × 100% = 0.8306 × 100% = 83.06%.