Predict the deviation from Raoult's law when two liquids are mixed and the heat of the solution is large and the reaction endothermic.
A) positive deviation
B) relatively ideal (small or zero deviation)
C) negative deviation

Question

Quizplus · Accepted Answer

A large heat of solution in an endothermic reaction indicates that energy is absorbed to overcome intermolecular forces between the two liquids. This results in weaker overall intermolecular attractive forces, leading to an increased likelihood of the liquid molecules escaping into the gas phase. As a result, the actual vapor pressure of the mixture will be greater than predicted by Raoult's law, resulting in a positive deviation.

Predict the Deviation from Raoult's Law When Two Liquids Are