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2.2 Thermal properties and temperature

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Question 271

An athlete is sweating after a run. The sweat on their skin gradually evaporates.

How does this evaporation affect the temperature of the remaining sweat, and how does it affect the average kinetic energy of the molecules remaining in the sweat?

A

Temperature: decreases; Average kinetic energy: decreases

B

Temperature: decreases; Average kinetic energy: increases

C

Temperature: increases; Average kinetic energy: decreases

D

Temperature: increases; Average kinetic energy: increases

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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