Question

For the reaction
$SO{Cl}_2+H_{2}O⟶S{O}_2+2HCl$
the enthalpy of reaction is $49.4kJ$ and the entropy of reaction is $336J{K}^{-1}$. Calculate $\Delta G$ at $300K$ and predict the nature of the reaction.

Answer 1

$\Delta G=\Delta H-T\Delta S$
$=49.4-(300\times 336\times {10}^{-3})=-51.4kJ$
Since, the free energy change is negative, the given reaction is spontaneous.