Calculate $\Delta$ G_r ^$\omicron$
for the Decomposition of Mercury(II) Oxide at 298

Multiple Choice

Calculate $\Delta$ G_r ^$\omicron$
for the decomposition of mercury(II) oxide at 298 K.
$\begin{array}{llll}&2 \mathrm{HgO}(\mathrm{s}) \rightarrow 2 \mathrm{Hg}(1) +\mathrm{O}_{2}(\mathrm{~g}) \\\Delta H_{\mathrm{f}^{\circ}}, \mathrm{kJ} \cdot \mathrm{mol}^{-1} & -90.83 & & \\S_{\mathrm{m}^{\circ}}, \mathrm{J} \cdot \mathrm{K}^{-1} \cdot \mathrm{mol}^{-1} & 70.29 & 76.02 & 205.14\end{array}$

A) -117.1 kJ.mol^-1
B) +246.2 kJ.mol^-1
C) -64.5 kJ.mol^-1
D) +117.1 kJ.mol^-1
E) -246.2 kJ.mol^-1