Then, how can I solve this problem?
According to Raoults law,
A. positive deviation occurs when partial pressures of molecules from a mixed liquid are lower than predicted.
B. negative deviation occurs when partial pressures of molecules from a mixed liquid are higher than predicted.
C. positive deviation occurs when molecules from a mixed liquid escape more difficultly than their pure counterparts.
D. positive deviation occurs when molecules from a mixed liquid escape more easily than their pure counterparts.
E. negative deviation occurs when molecules from a mixed liquid escape more easily than their pure counterparts.
The answer is D.
According to your theory, the vapor pressure of mixed solution is lower than pure solvent. --> lower vapor pressure means "hardly vaporized"
I usually think the same way, but how can I explain above problem?