Chemistry - Thermochemistry Question with Solution | TestHub

Given :
$\begin{array}{rl}& \Delta {\mathrm{H}}_{\text{sub }}^{\ominus }[\mathrm{C}(\text{ graphite })]=710\mathrm{kJ}{\mathrm{mol}}^{-1}\\ & {\Delta }_{\mathrm{C}-\mathrm{H}}{\mathrm{H}}^{\ominus }=414\mathrm{kJ}{\mathrm{mol}}^{-1}\\ & {\Delta }_{\mathrm{H}-\mathrm{H}}{\mathrm{H}}^{\Theta }=436\mathrm{kJ}{\mathrm{mol}}^{-1}\\ & {\Delta }_{\mathrm{C}=\mathrm{C}}{\mathrm{H}}^{\Theta }=611\mathrm{kJ}{\mathrm{mol}}^{-1}\end{array}$
The $\Delta {\mathrm{H}}_{\mathrm{f}}^{\ominus }$ for ${\mathrm{CH}}_2={\mathrm{CH}}_2$ is _____ $\mathrm{kJ}{\mathrm{mol}}^{-1}$ (nearest integer value)