For an ionic solid `MX_(2)`, where X is monovalent, the enthalpy of formation of the enthalpy of formation of the solid from M (s) and `X_(2) (g)` is

For an ionic solid `MX_(2)`, where X is monovalent, the enthalpy of formation of the enthalpy of formation of the solid from M (s) and `X_(2) (g)` is 1.5 times the electron gain enthalpy of `X(g)`. The first and second ionisation enthalpies of the meta (M) are 1.2 and 2.8 times of the enthalpy of sublimation of `M(s)`. The bond dissociation enthalpy of `X_(2) (g)` is 0.8 times the first ionisation enthalpy of metal and it is also equal to one -fifth of the magnitude of lattice enthalpy of `MX_(2)`. If the electron gain enthalpy of `X (g)` is `-96 K cal//mol`, the answer the enthalpy of sublimation of metal (M) in K cal/mol