1.

The lattice energy of solid NaCl is 180 kcal/mol. The dissolution of the solid in water in the form of ions is endotermic to the extent of 1 kcal/mol. If the solution energies of Na^(+) and Cl^(-) are in the ratio 6:5, What is the enthalpy of hydration of Na^(+) ion.

Answer»

`-85.6` kcal/mol
`-97.5` kcal/mol
`82.6` kcal/mol
`+100` kcal/mol.

ANSWER :B


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