Using the data provided, calculate the multiple bond energy $\left(\mathrm{kJ} \mathrm{mol}^{-1}\right)$ of a $\mathrm{C} \equiv \mathrm{C}$ bond $\mathrm{C}_2 \mathrm{H}_2$. That energy is (take the bond energy of a $\mathrm{C}-\mathrm{H}$ bond as $350 \mathrm{~kJ} \mathrm{~mol}^{-1}$ ) $$ \begin{array}{ll} 2 \mathrm{C}(\mathrm{~s})+\mathrm{H}_2(\mathrm{~g}) \longrightarrow \mathrm{C}_2 \mathrm{H}_2(\mathrm{~g}) & \Delta \mathrm{H}=225 \mathrm{~kJ} \mathrm{~mol}^{-1} \\ 2 \mathrm{C}(\mathrm{~s}) \longrightarrow 2 \mathrm{C}(\mathrm{~g}) & \Delta \mathrm{H}=1410 \mathrm{~kJ} \mathrm{~mol}^{-1} \\ \mathrm{H}_2(\mathrm{~g}) \longrightarrow 2 \mathrm{H}(\mathrm{~g}) & \Delta \mathrm{H}=330 \mathrm{~kJ} \mathrm{~mol}^{-1} \end{array} $$