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Question

If the heat of dissolution of an.CuSO4 and CuSO4.5H2O are (-15.89) kcal and 2.80 kcal respectively. Calculate the heat of hydration of CuSO4:

A
-13.09 kcal
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B
-18.69 kcal
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C
13.09 kcal
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D
18.69 kcal
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Solution

The correct option is C 13.09 kcal
CuSO4(s)+aqCuSO4(aq) ΔH=15.89 kcalCuSO4.5H2O(s)+aqCuSO4(aq) ΔH=2.80 kcal––––––––––––––––––––––––––––––––––––––––––––––––––––––––––CuSO4(s)+aqCuSO4.5H2O(aq) ΔH=?
Subtracting equation 2 from equation 1 gives 13.09 kcal.

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