Question

Formation of a solution from two components can be considered as : (i) Pure solvent $\rightarrow$ separated solvent molecules, $\Delta H _{1}$ (ii) Pure solvent $\rightarrow$ separated solvent molecules, $\Delta H _{2}$ (iii) Separated solvent and solute molecules $\rightarrow$ 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)

$\Delta H_{\text{Soln}} = \Delta H_1 + \Delta H_2 + \Delta H_3$

Answer 2

For ideal solution, $\Delta {{H}_{solution}}=\Delta {{H}_{1}}+\Delta {{H}_{2}}+\Delta {{H}_{3}}$