The formation enthalpies, $\Delta {{\rm{H}}_{\rm{f}}}^ \ominus $ for ${{\rm{H}}_{({\rm{g}})}}$ and ${{\rm{O}}_{({\rm{g}})}}$ are 220.0 and $250.0\;{\rm{kJ}}\;{\rm{mo}}{{\rm{l}}^{ - 1}}$ , respectively, at 298.15 K, and $\Delta {{\rm{H}}_{\rm{f}}}^ \ominus $ for ${{\rm{H}}_2}{{\rm{O}}_{({\rm{g}})}}$ is $ - 242.0\;{\rm{kJ}}\;{\rm{mo}}{{\rm{l}}^{ - 1}}$ at the same temperature. The average bond enthalpy of the ${\rm{O}} - {\rm{H}}$ bond in water at 298.15 K is ____ ${\rm{kJmo}}{{\rm{l}}^{ - 1}}$ (nearest integer).