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2.2 Thermal properties and temperature

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Question 111
a.

State three factors that affect the rate of evaporation of a liquid.

  1. .....................................................................................................

  2. .....................................................................................................

  3. .....................................................................................................

[3]
b.

After a strenuous workout, a runner's skin is covered in sweat. Explain, in terms of molecules and heat transfer, why the evaporation of sweat helps to cool the runner's body.

[4]
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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