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Formation of a solution from two compone...

Formation of a solution from two componenets can be considered as :
(i) pure sovent `rarr` separated solvent molecules, `/_\H_(1)`
(ii) Pure solute `rarr`separated molecules,`/_\H_(2)`
(iii) separated sovent and solute molecules`rarr`solution, `/_\H_(3)`
solution so formed will be ideal if :

A

`DeltaH_("soln") = DeltaH_(3)- DeltaH_(1)-DeltaH_(2)`

B

`DeltaH_("soln") = DeltaH_(1) +DeltaH_(2)+DeltaH_(3)`

C

`DeltaH_("soln") = DeltaH_(1) +DeltaH_(2)-DeltaH_(3)`

D

`DeltaH_("soln") = DeltaH_(1)-DeltaH_(2)-DeltaH_(3)`

Text Solution

Verified by Experts

The correct Answer is:
B
According to Hess' law
`DeltaH_("soln") = DeltaH_(1) +DeltaH_(2) + DeltaH_(3)`.
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