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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

`Delta H_("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`

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The correct Answer is:
B
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formation of a solution form two components can be considered as (i) Pure solvent rarr separated solvent molecules, DeltaH_(1) (ii) Pure solute rarr separated solute molecules, DeltaH_(2) (iii) separated solvent and solute molecules rarr solution, DeltaH_(3) Solution so formed will be ideal if