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2.2 Thermal properties and temperature

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Question 132

A runner perspires during a race, leaving sweat (primarily water) on their skin.

Here are three statements about the process of evaporation and its effects:

  • (X) The liquid sweat requires thermal energy to evaporate.
  • (Y) The sweat absorbs this thermal energy from the runner's body.
  • (Z) The temperature of the runner's skin decreases as a result.

Which statements are correct?

A

(X) and (Y) only

B

(X) and (Z) only

C

(Y) and (Z) only

D

(X), (Y) and (Z)

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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