At $25^{\circ} \mathrm{C}$, the enthalpy of the following processes are given :

$\mathrm{H_2(g)+O_2(g)}$	$\to$	$2\mathrm{OH(g)}$	$\mathrm{\Delta H^\circ=78~kJ~mol^{-1}}$
$\mathrm{H_2(g)+\frac{1}{2}O_2(g)}$	$\to$	$\mathrm{H_2O(g)}$	$\mathrm{\Delta H^\circ=-242~kJ~mol^{-1}}$
$\mathrm{H_2(g)}$	$\to$	$\mathrm{2H(g)}$	$\mathrm{\Delta H^\circ=436~kJ~mol^{-1}}$
$\frac{1}{2}\mathrm{O_2(g)}$	$\to$	$\mathrm{O(g)}$	$\mathrm{\Delta H^\circ=249~kJ~mol^{-1}}$

What would be the value of X for the following reaction ? _____________ (Nearest integer)

$\mathrm{H_2O(g)\to H(g)+OH(g)~\Delta H^\circ=X~kJ~mol^{-1}}$