Question

Formation of a solution from two components can be considered as :
(i) Pure solvent $\to$ separated solvent molecules, $\Delta H_1$
(ii) Pure solvent $\to$ separated solvent 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. $\Delta H_{\text{Soln}}=\Delta H_1-\Delta H_2-\Delta H_3$
• D. $\Delta H_{\text{Soln}}=\Delta H_3-\Delta H_1-\Delta H_2$

Answer 1

Answer: (A)

For ideal solution, $\Delta H_{\text{solution}}=\Delta H_1+\Delta H_2+\Delta H_3$