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The lattice energy of solid NaCl is 180K...

The lattice energy of solid NaCl is 180K. Call per mol. The dissolution of the solid in water in the form of ions is endothermic to the extent of 1K, Cal per mol. If the solvation energies of `Na^(+) and Cl^(-)` ions are in ratio `6:5`, what is the enthalpy of hydration of sodium ion?

A

`85.6`K.Cal/mol

B

`-97.5` K.Cal/mol

C

82.6 K.Cal/mol

D

`+100` K.Cal/mol

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The correct Answer is:
B
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