Compare the pressure of aniline and water in vapour phase distillation.

(N/A) In steam distillation,the mixture of organic liquid (aniline) and water boils when the sum of their individual vapour pressures equals the atmospheric pressure.
Let $p_1$ be the vapour pressure of water and $p_2$ be the vapour pressure of aniline.
The total pressure $p$ is given by Dalton's law of partial pressures as:
$p = p_1 + p_2$
Since the mixture boils at a temperature lower than the boiling point of either pure component,the individual vapour pressures $p_1$ and $p_2$ are each less than the total atmospheric pressure $p$.