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2.2 Thermal properties and temperature

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Question 287

When a liquid evaporates, the most energetic molecules escape from its surface into the surrounding air.

Which option correctly describes what happens to the average kinetic energy of the remaining molecules and the temperature of the remaining liquid?

A

Average kinetic energy of remaining molecules decreases; Temperature of remaining liquid decreases

B

Average kinetic energy of remaining molecules decreases; Temperature of remaining liquid increases

C

Average kinetic energy of remaining molecules remains unchanged; Temperature of remaining liquid decreases

D

Average kinetic energy of remaining molecules remains unchanged; Temperature of remaining liquid remains unchanged

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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