ChemistryIdentify which liquid will have a higher vapour pressure at 90℃ if the boiling points of two liquids A and B are 140℃ and 180℃, respectively.

Identify which liquid will have a higher vapour pressure at 90℃ if the boiling points of two liquids A and B are 140℃ and 180℃, respectively.

Solution:

Boiling point of liquid A is 140℃
Boiling point of liquid B is 180℃
${B.P}_{A} < {B.P}_{B}$
Liquid A is more volatile in nature.
Hence, P₀of A >P₀ of B.

So, liquid A has high vapor pressure.