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2.2.3a Melting, boiling, condensation and solidification

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Question 26
a.

List the correct term for each of the following changes of state:

  1. A substance changing from a solid to a liquid.
  2. A substance changing from a liquid to a gas below its boiling point.
  3. A substance changing from a liquid to a solid.
[3]
b.

A person rubs a small amount of hand sanitizer (which evaporates very quickly) onto their palm. As the liquid evaporates, their palm feels cold.

Explain, in terms of molecules and energy transfer, why the palm cools down.

[3]
Markscheme

2.2.3a Melting, boiling, condensation and solidification Questions

  1. IGCSE
  2. /Physics
  3. /2.2.3a Melting, boiling, condensation and solidification

313 exam-style questions on CIE IGCSE Physics 2.2.3a Melting, boiling, condensation and solidification. Each one has a worked solution and a mark scheme showing where the marks go.

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