Calculate the Standard Free Energy of Formation of Mercury(II) Oxide

question 74

Multiple Choice

Calculate the standard free energy of formation of mercury(II) oxide at 298 K,
Given
$\begin{array}{ll}&\mathrm{HgO}(\mathrm{s}) & \mathrm{Hg}(1) &\mathrm{O}_{2}(\mathrm{~g}) \\\Delta H_{\mathrm{f}^{\circ}}, \mathrm{kJ} \cdot \mathrm{mol}^{-1} & -90.83&-&- \\S_{\mathrm{m}}{ }^{\circ}, \mathrm{J} \cdot \mathrm{K}^{-1} \cdot \mathrm{mol}^{-1} & 70.29&76.02&205.14\end{array}$

• A) +58.5 kJ.mol^-1
• B) +117.1 kJ.mol^-1
• C) -58.5 kJ.mol^-1
• D) -123.1 kJ.mol^-1
• E) -117.1 kJ.mol^-1

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