Chemistry - Thermochemistry Question with Solution | TestHub

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$\mathrm{R}=8.314 \mathrm{J} {\mathrm{mol}}^{-1} {\mathrm{K}}^{-1}$]