Experiment #4 Water phase change in a vacuum chamber

Freezing water in a vacuum chamber: Liquid boils when the vapour pressure of the liquid is equal to the pressure exerted on it. When pressure on a liquid is reduced the vapour pressure is also reduced and the boiling point drops. See our demonstration You will need a vacuum pump, a bell jar, water and a thermometer. If you replicate this experiment please make sure a responsible adult is present. Visit: www.edwardsvacuum.com for more information

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