Normal Boiling Point Definition

Normal vs Regular Boiling Point

Normal boiling point is defined as the boiling point at sea level or 1 atmosphere.
Normal boiling point is defined as the boiling point at sea level or 1 atmosphere. Kroeger & Gross / Getty Images

Normal Boiling Point Definition

Normal boiling point is the temperature at which a liquid boils at 1 atmosphere of pressure. It's different from the simple definition of boiling point in that the pressure is defined. The normal boiling point is a more useful value when comparing different liquids, since boiling is affected by altitude and pressure.