The reaction of cyanamide, ${\mathrm{NH}}_2{\mathrm{CN}}_{\left(\mathrm{s}\right)}$ with oxygen was run in a bomb calorimeter and $\mathrm{\Delta U}$ was found to be $-742.24 \mathrm{kJ} {\mathrm{mol}}^{-1}$ . The magnitude of ${\mathrm{\Delta H}}_{298}$ for the reaction  ${\mathrm{NH}}_2{\mathrm{CN}}_{\left(\mathrm{s}\right)}+\frac{3}{2}{\mathrm{O}}_{2\left(\mathrm{g}\right)}\to {\mathrm{N}}_{2\left(\mathrm{g}\right)}+{\mathrm{O}}_{2\left(\mathrm{g}\right)}+{\mathrm{H}}_2{\mathrm{O}}_{\left(\mathrm{l}\right)}$ is $\mathrm{kJ}$. (Rounded off to the nearest integer) [Assume ideal gases and $\mathrm{R}=8.314 \mathrm{J} {\mathrm{mol}}^{-1} {\mathrm{K}}^{-1}$]