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2.2 Thermal properties and temperature

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Question 379

When a liquid evaporates, some molecules escape from its surface. Which molecules are most likely to escape, and how does the average kinetic energy of the remaining molecules change?

A

those with the lowest kinetic energy; increases

B

those with the lowest kinetic energy; decreases

C

those with the highest kinetic energy; increases

D

those with the highest kinetic energy; decreases

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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