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

question 177

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

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