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2.2 Thermal properties and temperature

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Question 58
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 Thermal properties and temperature Questions

  1. IGCSE
  2. /Physics
  3. /2.2 Thermal properties and temperature

528 exam-style questions on CIE IGCSE Physics 2.2 Thermal properties and temperature, covering 2.2.1 Thermal expansion of solids, liquids and gases, 2.2.2a Internal energy and temperature, 2.2.2b Specific heat capacity, 2.2.3a Melting, boiling, condensation and solidification, 2.2.3b Evaporation, and 2.2.3c Cooling by evaporation. Each one has a worked solution and a mark scheme showing where the marks go.

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