question_answer

Formation of a solution from two components can be considered as

(i) pure solvent \[\to \] separated solvent molecules,\[\Delta {{H}_{1}}\]

(ii) pure solute \[\to \] separated solute molecules,\[\Delta {{H}_{2}}\]

(iii) separated solvent and solute molecules\[\to \] solution,\[\Delta {{H}_{3}}\]

Solution so formed will be ideal if

A) \[\Delta {{H}_{\text{soln}}}=\Delta {{H}_{1}}+\Delta {{H}_{2}}-\Delta {{H}_{3}}\]

B) \[\Delta {{H}_{\text{soln}}}=\Delta {{H}_{1}}-\Delta {{H}_{2}}-\Delta {{H}_{3}}\]

C) \[\Delta {{H}_{\text{soln}}}=\Delta {{H}_{3}}-\Delta {{H}_{1}}-\Delta {{H}_{2}}\]

D) \[\Delta {{H}_{\text{soln}}}=\Delta {{H}_{1}}+\Delta {{H}_{2}}+\Delta {{H}_{3}}\]