He heat of solution of kcl is 17. 2 kj/mol and the lattice energy of kcl(s) is 701. 2 kj/mol. calculate the total heat of hydrat

Question

2 years ago

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ion of 1. 00 mol of gas phase k ions and cl– ions

1 answer:

Alexandra [31] · Answer 1 · 2023-12-27T11:49:56+03:00

The total heat of hydration of 1. 00 mol of gas phase $K^{+}$ ions and $Cl^{-}$ ions is - 684 kJ/mol.

Calculation ,

Given data ,

Heat of solution = 17. 2 kJ/mol

lattice energy of KCl(s) = 701. 2 kJ/mol.

heat of hydration = ?

The KCl is formed by $K^{+}$ ions and $Cl^{-}$ – ions

Δ $H_{solution}$ = U° + Δ $H_{hydration}$

Δ $H_{hydration}$ = Δ $H_{solution}$ - U° = 17. 2 kJ/mol - 701. 2 kJ/mol = - 684 kJ/mol

Hence, heat of hydration of 1. 00 mol of gas phase $K^{+}$ ions and $Cl^{-}$ ions is - 684 kJ/mol.

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