JEE Main 2024 Chemistry question
The heat of solution of anhydrous CuSO₄ and CuSO₄·5H₂O are −70 kJ mol⁻¹ and +12 kJ mol⁻¹ respectively. The heat of hydration of CuSO₄ to CuSO₄·5H₂O is −x kJ. The value of x is .
Answer: 82
Solution
Reaction (1): CuSO₄(s) + 5H₂O → CuSO₄·5H₂O (ΔH = −x). Reaction (2): CuSO₄·5H₂O + aq → CuSO₄(aq), ΔH =
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