Calculate the enthalpy of hydration of anhydrous copper sulphate`(CuSO_4)` into hydrated copper sulphate `(CuSO_4 cdot 5H_2O)`. Given that the enthalpies of solution of anhydrous copper sulphate and hydrated copper sulphate are `-66.5 and + 11.7 kJ mol^(-1)` respectively.

Explanation

To calculate the enthalpy of hydration of anhydrous copper sulfate (CuSO₄) into hydrated copper sulfate (CuSO₄·5H₂O), we will use the given enthalpies of solution for both anhydrous and hydrated copper sulfate.

### Step-by-Step Solution:

1. **Understand the Given Data**:
- Enthalpy of solution of anhydrous copper sulfate (CuSO₄): ΔH₁ = -66.5 kJ/mol
- Enthalpy of solution of hydrated copper sulfate (CuSO₄·5H₂O): ΔH₂ = +11.7 kJ/mol

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