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Q.

Lattice enthalpy of ‘AB(s)’  is equal to 90 Kcal/mole. Magnitude of hydration enthalpies of A+ and B- are 63 Kcal/mole and 45 Kcal/mole respectively. Enthalpy of solution of ‘AB’ will be

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Detailed Solution

ΔHU=+90KcalsEndothermicΔHHydration=-63-45Kcal                  =−108Kcalsexothermic  ΔHsolution=ΔHU+ΔHHydration                 =+90−108Kcals                 =−18Kcals
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