Cambridge IGCSE Physics

2.2.3Melting, boiling and evaporation

Melting, boiling and evaporation in Cambridge IGCSE Physics: what the syllabus expects you to know, the learning objectives and how to practise.

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Learning objectives

What the syllabus expects you to be able to do.

2.2.3.1Describe melting and boiling as needing energy input with no change in temperature.
2.2.3.2Know the melting and boiling points of water at standard atmospheric pressure.
2.2.3.3Describe condensation and solidification in terms of particles.
2.2.3.4Describe evaporation as the escape of the more energetic particles from a liquid's surface.
2.2.3.5Know that evaporation cools a liquid.
2.2.3.6Supplement: describe how boiling differs from evaporation.
2.2.3.7Supplement: describe how temperature, surface area and air movement affect the rate of evaporation.
2.2.3.8Supplement: explain how an object in contact with an evaporating liquid is cooled.

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