${S_R} + {O_{2\left( g \right)}} \to S{O_{2\left( g \right)}};\,\Delta H = - 296.90\,kJ$
${S_M} + {O_{2\left( g \right)}} \to S{O_{2\left( g \right)}};\,\Delta H = - 299.40\,kJ$
\(ii)\) \(S _{ M }+ O _2 \longrightarrow SO _2 \quad \Delta _{ ii }=-299.4\)
\(iii)\) \(S_R \longrightarrow S_M\)
\(\therefore \Delta H=\Delta H_i-\Delta H_{i i }=-296.9-(-299.4)=2.5\,kJ\)
આપેલ : $\Delta H ^{\circ}=-54.07\,kJ\,mol ^{-1}$
$\Delta S ^{\circ}=10\,J\,K ^{-1}\,mol ^{-1}$
$(2.303 \times 8.314 \times 298=5705$ લો.)