Question

Why vapour pressure of ethanol is higher than water?

Answer 1

Because it has a hydroxyl group, it can form hydrogen bonds with itself. This means its molecules are more strongly attracted to each other than acetone's. Therefore, pure acetone is morevolatile than pure ethanol, and at the same temperatures will have a highervapor pressure than ethanol.

Answer 2

$\color{blue}\huge\bold\star\underline\mathcal{Hey\:Mate}\star$

Because it has a hydroxyl group, it can form hydrogen bonds with itself. This means its molecules are more strongly attracted to each other than acetone's. Therefore, pure acetone is more volatile than pure ethanol, and at the same temperatures will have a higher vapor pressure than ethanol.