Question
Formation of a solution from two components can be considered as
(i) pure solvent → separated solvent molecules, $$\Delta {H_1}$$
(ii) pure solute → separated solute molecules, $$\Delta {H_2}$$
(iii) separated solvent and solute molecules → solution, $$\Delta {H_3}$$
Solution so formed will be ideal, if
A.
$$\Delta {H_{sol.}} = \Delta {H_1} - \Delta {H_2} - \Delta {H_3}$$
B.
$$\Delta {H_{sol.}} = \Delta {H_3} - \Delta {H_1} - \Delta {H_2}$$
C.
$$\Delta {H_{sol.}} = \Delta {H_1} + \Delta {H_2} + \Delta {H_3}$$
D.
$$\Delta {H_{sol.}} = \Delta {H_1} + \Delta {H_2} - \Delta {H_3}$$
Answer :
$$\Delta {H_{sol.}} = \Delta {H_1} + \Delta {H_2} + \Delta {H_3}$$
Solution :
$$\eqalign{
& {\text{For an ideal solution,}} \cr
& \Delta {H_{sol.}} = \Delta {H_1} + \Delta {H_2} + \Delta {H_3} \cr} $$