The dissolution of barium hydroxide in water is an exothermic process, which statement is correct? O...

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Question

Answer 1

Answer #1

Answer is enthalpy of solid barium hydroxide plus water is greater than that of the solution, at the same temperature.

Ba(OH)2(s) + H2O(l) -> Ba(OH)2(aq)

Here, ∆H = ∆fH(Ba(OH)2(aq)) - [∆fH(Ba(OH)2(s) + ∆fH(H2O)]

Since, ∆H is negative hence subtracted term is greater than that of term from which it is selected.

Answer 2

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