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2.2 Thermal properties and temperature

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Question 22

A bottle of milk is kept cool on a hot day by wrapping it in a wet cloth. As water evaporates from the cloth, it cools the bottle.

Which water molecules escape during evaporation, and what happens to the average kinetic energy of the water molecules that remain in the cloth?

A

those with lower kinetic energy; decreases

B

those with lower kinetic energy; increases

C

those with higher kinetic energy; decreases

D

those with higher 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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