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  • If the heat of dissolution of anhydrous and <img alt="CuSO_4\cdot5H_2O" src="http://entrancecorner.oncodec

If the heat of dissolution of anhydrous CuSO_4 and CuSO_4\cdot5H_2O is -60 KJ/mol and -11.2 KJ/mol, respectively, then heat of hydration (in kJ/mol) of CuSO_4 to form  CuSO_4\cdot5H_2O is

Option: 1

71.2


Option: 2

-71.2


Option: 3

48.8


Option: 4

-48.8


Answers (1)

best_answer

First write the balanced equation of the reaction,
\\CuSO_4 (s) + aq \rightarrow CuSO_4\cdot5H_2O\;\;\;\;\Delta H = - 60KJ \\CuSO_4\cdot5H_2O + aq \rightarrow CuSO_4\cdot5H_2O\;\;\;\;\Delta H = -11.2KJ

We have to add the above equations to get the desired equation.
\Delta_{hyd} H = \Delta H_1 + \Delta H _2

Heat of Hydration = - 60KJ - 11.2KJ = -71.2 KJ

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Ritika Kankaria

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