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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
HgO(s) Hg(1) O2( g) ΔHf,kJmol190.83Sm,JK1mol170.2976.02205.14\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

Correct Answer:

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