hello riya..

Vapor pressure is the pressure exerted by a liquid back on the atomosphere. Vapor pressure depends on the nature of the liquid and the temperature. No matter what volume the water is, the vapor pressure of the water is the same as long as the temperature is not change. Vapour pressure can be defined as pressure formed by the vapor of the liquid (or solid) over the surface of the liquid. This pressure is formed in a thermodynamic equilibrium state in a closed container at a certain temperature. Liquid's evaporation rate is identified by the equilibrium vapor pressure.

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