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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 thermochemical equations for the above dissolution are :
`KC l (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 dilution ` = Delta H _(2) - Delta H _(1) = 18.6 kJ - 15.9 kJ = 2.7 kJ`
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