The Born-Haber cycle for KCl is evaluated with the following

 data: ${\mathrm{\Delta }}_{\mathrm{f}}\mathrm{H} \mathrm{for} \mathrm{KCl}=-436.7 \mathrm{KJ}/\mathrm{mole}$

${\mathrm{\Delta }}_{\mathrm{sub}}\mathrm{H} \mathrm{for} \mathrm{K}=89.2 \mathrm{KJ}/\mathrm{mole}$

${\mathrm{\Delta }}_{\text{vapourisation}} \mathrm{H} \mathrm{for} \mathrm{K} =419.0\mathrm{KJ}/\mathrm{mole}$

${\mathrm{\Delta }}_{\mathrm{bond}}\mathrm{H} \mathrm{for} {\mathrm{Cl}}_2 =243 \mathrm{kJ}/\mathrm{mole}$   The magnitude of lattice enthalpy of KCl in KJ/mole is _____