For the reaction C(s) + 1/2 (g) -> (g), — Thermodynamics and Thermochemistry Chemistry Question

💡 Solution & Explanation

Reaction: $C(s)+\tfrac{1}{2}O_2(g)\to CO(g)$. $\Delta n_g = 1 - \tfrac{1}{2} = +0.5$. Relation: $\Delta H = \Delta E + \Delta n_g RT = \Delta E + 0.5RT$. Since $RT>0$, we get $\Delta H>\Delta E$. Correct option: $\boxed{A}$