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The enthalpies of solution for copper su...

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

A

`-53.8 kJ mol ^(-1)`

B

`53.8 k J mol ^(-1)`

C

`- 77.2 kJ mol ^(-1)`

D

`77.2 k J mol ^(-1)`

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