What Is Boiling Point Elevation?

What Is Boiling Point Elevation?

What Is Boiling Point Elevation?

The term boiling point elevation refers to solutions having higher boiling points than pure solvents. Boiling point elevation is a colligative property of a solution.

Boiling point elevation is not dependent on the type of solute (dissolved particles), but rather on their number (concentration). Suspended particles “dilute” the solvent, causing a drop in the solvent’s vapor pressure. Since liquids boil when their vapor pressure is equal to atmospheric pressure, diluted solvents need a higher temperature to reach that point.

Correspondingly, diluted solvents also have decreased freezing points. This colligative property is successfully utilized in the winter, when adding antifreeze to a car’s cooling system prevents freezing of the system despite temperatures below water’s normal freezing point.