The enthalpies of solution for copper sulphate pentahydrate and anhydrous copper sulphate are respectively 11.7 and `-65.5 kJ mol^(-1)`.The hydration enthalpy of anhydrous copper sulphate is

Options

A. `53.8 kJ mol^(-1)`
B. ` - 9.8 kJ mol^(-1)`
C. ` - 77.2kJ mol^(-1)`
D. ` -53.8 kJ mol^(-1)`

Answer

c

Explanation

Refer to second Solved Sample Problem