Q.
For the reaction given below the values of standard Gibbs free energy of formation at $298 \,K$ are given. What is the nature of the reaction?
$I_2 + H_2S \to 2HI + S$
$\Delta G^{\circ}_{f}\left(HI\right) = 1.8\,kJ\,mol^{-1}$, $\Delta G^{\circ }_{f}\left(H_{2}S\right) = 33.8\,kJ\,mol^{-1}$
Thermodynamics
Solution: