Question

Account for the following: Positive deviation from Raoult’s law is shown by the mixture of ethanol and acetone.

Answer 1

The reasons for +ve deviation from raolt's law are:

1) A-A and B-B intermolecular forces are greater than A-B inter molecular forces...where A can be acetone and B can be ethanol or vice versa...which results in increaseb in vapour pressure

2)ΔV=  +ve

3)ΔH = +ve