Define boiling point elevation?(what is boiling point elevation)

 Define boiling point elevation?


When we add solute to the solvent boiling point of solution will be more than that of pure solvent.

The difference between the boiling points of solution to that of solvent is known as boiling point elevation.

Example;

Aqueous sugar solution boiling point is more than that of pure water.

Phenomena:

We know that vapor pressure is directly proportional to the surface of the free liquid surface. When we add solute to the solvent free liquid surface decreases and in turn vapor pressure also decreases. So boiling point increases with the addition of solute to the solvent.

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