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2.2 Thermal properties and temperature

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Question 140

A fan blows air across the surface of a cup of water, causing the water to evaporate more rapidly.

Which statement explains why this evaporation process causes the temperature of the remaining water to decrease?

A

Slower-moving molecules are carried away by the air currents.

B

Warm air molecules conduct heat away from the water.

C

The water molecules with the highest kinetic energy escape from the surface.

D

The wind sets up convection currents that cool the liquid.

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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