School of Physics Lecture Demonstration Manual

Hf-2 Boiling Water at Room Temperature

Published: Monday 13 March 2006 - Updated: Monday 28 March 2011


To demonstrate that the boiling point of a liquid depends on the pressure



Click on pictures to enlarge.

Boiling Water at Room Temp Diagram


A light layer of vacuum grease is applied to the rim of the dessicator. Water at room temperature is placed inside and the vacuum pump is then used to evacuate the vessel. When the air pressure is reduced to the vapour pressure of water at room temperature the water will begin to boil.

Safety notes

Electrical safety 

Fire/Burn Safety 


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