Calculate the Standard Reaction Gibbs Energy for the Reaction
2

Multiple Choice

Calculate the standard reaction Gibbs energy for the reaction
2 N₂O₅(g) 4 NO₂(g) + O₂(g) at a temperature of 298 K. The standard Gibbs energies of formation of the components at this temperature are given in the table below.
$\begin{array}{lc}& \Delta \mathrm{f} G^{e}(298 \mathrm{~K}) / \mathrm{kJ} \mathrm{mol}^{-1} \\\mathrm{N}_{2} \mathrm{O}_{5} \\& +118.0 \\\mathrm{NO}_{2} \\& +51.8\\\mathrm{O}_{2}\\&0\\\end{array}$

A) -66.2 kJ mol^-1
B) -89.2 kJ mol^-1
C) -28.8 kJ mol^-1
D) -169.8 kJ mol^-1