How To Calculate Vapor Pressure? | Vapour Pressure Of A Solution

Short tutorial on how to calculate vapour pressure of a solution.

Calculate Vapour Pressure Of a Solution

Vapor pressure of a solution is the pressure created on the top of the liquid by the gas molecules during evaporation of a liquid inside a closed container.
Let us learn how to calculate vapour pressure of a solution in this short tutorial with a neat example. Vapor Pressure Formula:
Psolution = Xsolvent x P°solvent
Psolution = the vapor pressure of the solution
Xsolvent = the mole fraction of the solvent in the solution
P°solvent = the vapor pressure of the pure solvent at standard conditions Example:

Calculate vapor pressure of a solution at 0.741 mole fraction of the solvent in a solution and 23.8 vapor pressure of the pure solvent at standard conditions?
Given:
Mole Fraction = 0.741
Vapour pressure of pure solvent = 23.4 Solution:
Psolution = Xsolvent x P°solvent
Vapor Pressure Psolution = 0.741 x 23.4
Vapor Pressure Psolution = 17.33 