What is the differences between partial pressure and vapour pressure?

Partial Pressure is the term used for gaseous mixture while vapour pressure is used for liquids.

Partial pressure of a gas is the individual pressure of that gas present in a mixture of gaseous.
For a mixture containing three gases say A. B & C, the total pressure of the mixture will be sum of the partial pressures of gases A, B & C.
In other words, in a mixture of gases, each gas has a partial pressure which is the hypothetical pressure of that gas if it alone occupied the volume of the mixture at the same temperature

P _total = p⁰_A+ p^o_B +p^o_c

Vapor pressure of a liquid is the pressure exerted by a vapor in thermodynamic equilibrium with its condensed phases at a given temperature in a closed system.

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Sumit Kumar

askIITians Faculty