Chemistry - Thermochemistry Question with Solution | TestHub

The positive standard Gibbs free energy change, ΔG° = +0.91 kcal, indicates that the reaction is non-spontaneous under standard conditions and is endergonic.

It is important to note that a positive standard cell potential (Δ E° > 0) and a positive standard entropy change (ΔS°) do not guarantee spontaneity at 298 K. In this case, the TΔS term, which is 2.38 kcal, is smaller than the enthalpy change ΔH = 3.29 kcal. This corresponds to option (d).