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Integral enthalpy of solution for one mo...

Integral enthalpy of solution for one mole of KCl dissolved in 20 moles of water is +15.9kJ. When 1 mole is dissolved in 200 moles of water, `DeltaH` is 18.6k). Calculate the enthalpy of dilution.

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The themochemical equations for the above dissolution are .
`KCl (s) + 20 H _(2) O to KCl ( 20 H _(2) O), Delta H _(1) = + 15. 9 kJ " "...(i)`
`KCl (s) + 200 H _(2) O to KCl ( 200 H _(2) O) , Delta H _(2) = + 18.5 kJ " "...(ii)`
Heat of dilutino `= Delta H _(2) - Delta H _(1) = 18. 6 kJ - 15 . 9 kj = 2. 7 kJ`
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