Q. Formation of a solution from two components can be considered as (1) pure solvent $\rightarrow$ separated solvent molecules, ${\mathrm{\Delta}H}_{1}$ (2) pure solute $\rightarrow$ separated solvent molecules,$\ {\mathrm{\Delta}H}_{2}$ (3) separated solvent and solute molecules $\rightarrow$ solution,$\ {\mathrm{\Delta}H}_{3}$ Solution so formed will be ideal if
A) $\mathrm{\Delta}H_{soln} = \mathrm{\Delta}H_{1} - \mathrm{\Delta}H_{2} - \mathrm{\Delta}H_{3}$
B) $\mathrm{\Delta}H_{soln} = \mathrm{\Delta}H_{3} - \mathrm{\Delta}H_{1} - \mathrm{\Delta}H_{2}$
C) $\mathrm{\Delta}H_{soln} = \mathrm{\Delta}H_{1} + \mathrm{\Delta}H_{2} + \mathrm{\Delta}H_{3}$
D) $\mathrm{\Delta}H_{soln} = \mathrm{\Delta}H_{1} + \mathrm{\Delta}H_{2} - \mathrm{\Delta}H_{3}$
Explanation
(c)
For ideal solution,
${\bigtriangleup H}_{solution\ } = {\bigtriangleup H}_{1} + {\bigtriangleup H}_{2} + {\bigtriangleup H}_{3}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.