Explain the vapour pressure of solutions of s | vedclass

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(N/A) Liquids at a given temperature vaporize,and under equilibrium conditions,the pressure exerted by the vapours of the liquid over the liquid phase

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(N/A) Liquids at a given temperature vaporize,and under equilibrium conditions,the pressure exerted by the vapours of the liquid over the liquid phase is called vapour pressure.
In a pure liquid,the entire surface is occupied by the molecules of the liquid. If a non-volatile solute is added to a solvent to form a solution,the vapour pressure of the solution is solely due to the solvent molecules.
This vapour pressure of the solution at a given temperature is found to be lower than the vapour pressure of the pure solvent at the same temperature. In the solution,the surface contains both solute and solvent molecules; thereby,the fraction of the surface covered by the solvent molecules is reduced. Consequently,the number of solvent molecules escaping from the surface is correspondingly reduced,thus,the vapour pressure is also reduced.

Explain the vapour pressure of solutions of solids in liquids.

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