ΔS° for the cell reaction per mol of AgCl is — Electrochemistry Chemistry Question

💡 Solution & Explanation

The entropy change is calculated using the temperature coefficient of the cell: ΔS = nF(∂E/∂T). For 1 mole of AgCl (n = 1), the coefficient ∂E/∂T = (0.21 - 0.23) / 20 = -0.001 V/K. Substituting values: ΔS = 1 × 96500 × (-0.001) = -96.5 J/K. Therefore, correct answer is B.