The standard reaction enthalpy for hydrogenation of propene is -124 kJ mol^-1. Additionally, standard heat of combustion Δ_c H^ (propane) =-2220 kJ…

The standard reaction enthalpy for hydrogenation of propene is $\displaystyle -124 \mathrm{~kJ} \mathrm{~mol}^{-1}$. Additionally, standard heat of combustion $\displaystyle \Delta_{\mathrm{c}} \mathrm{H}^{\ominus}$ (propane) $\displaystyle =-2220 \mathrm{~kJ} \mathrm{~mol}^{-1}$. and standard heat of formation $\displaystyle \Delta_{\mathrm{f}} \mathrm{H}^{\ominus}$ (water) $\displaystyle =-286 \mathrm{~kJ} \mathrm{~mol}^{-1}$.If $\displaystyle \Delta_{\mathrm{c}} \mathrm{H}^{\ominus}$ (propene) $\displaystyle =-x \mathrm{~kJ} \mathrm{~mol}^{-1}$, the value of $\displaystyle x$ is \_\_\_\_. (Nearest integer)