${\mathrm{PCl}}_5\left(s\right)$ reacts with ${\mathrm{H}}_2\mathrm{O}\left(l\right)$ according to the equation:

${\mathrm{PCl}}_5\left(s\right)+4{\mathrm{H}}_2\mathrm{O}\left(l\right)⟶{\mathrm{H}}_3{\mathrm{PO}}_4\left(aq\right)+5\mathrm{HCl}\left(aq\right)$ What is $\mathrm{\Delta }{H}^{\circ }$ for this reaction in $\mathrm{kJ}/{\mathrm{mol}}^{-1}?$

Substance	$\mathrm{\Delta }{\mathit{H}}_f^{\circ },\mathbf{kJ}/\mathbf{mol}$
${\mathrm{PCl}}_5\left(s\right)$	-443.5
${\mathrm{H}}_2\mathrm{O}\left(l\right)$	-285.8
${\mathrm{H}}_3{\mathrm{PO}}_4\left(aq\right)$	-1284.4
$\mathrm{HCM}\left(aq\right)$	-167.1