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 can use the enthalpies of solution provided in the question.

### Step-by-Step Solution:

1. **Write the Chemical Equations**:
- For the dissolution of hydrated copper sulfate:
\[
\text{CuSO}_4 \cdot 5\text{H}_2\text{O (s)} + \text{aq} \rightarrow \text{CuSO}_4 \text{ (aq)} + 5\text{H}_2\text{O (l)} \quad \Delta H_1 = +11.7 \, \text{kJ/mol}
...