Calculate ?S° for the Dissociation of Dinitrogen Tetraoxide at 25°C

Multiple Choice

Calculate ?S° for the dissociation of dinitrogen tetraoxide at 25°C. N₂O₄(g) ? 2NO₂(g)
$\begin{array}{lll}\text { Substance } & \Delta G_{\mathrm{f}}^{\circ}(\mathrm{kJ} / \mathrm{mol}) & \Delta H_{\mathrm{f}}^{\circ}(\mathrm{kJ} / \mathrm{mol}) \\\hline \mathrm{NO}_{2}(g) & +51.3 & +33.2 \\\mathrm{~N}_{2} \mathrm{O}_{4}(g) & +97.9 & +9.2\end{array}$

A) ?2.10 kJ/K
B) ?0.550 kJ/K
C) ?0.208 kJ/K
D) +0.076 kJ/K
E) +2.10 kJ/K