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2.2 Thermal properties and temperature

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Question 213

During the process of evaporation, liquid molecules transition to the gas phase. Which option correctly identifies where these escaping molecules leave from, and the resulting change in the average kinetic energy of the remaining molecules?

A

Escape location: throughout the body of the liquid; Average kinetic energy of remaining molecules: Decreases

B

Escape location: throughout the body of the liquid; Average kinetic energy of remaining molecules: Increases

C

Escape location: surface of the liquid; Average kinetic energy of remaining molecules: Decreases

D

Escape location: surface of the liquid; Average kinetic energy of remaining molecules: 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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