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2.2.3a Melting, boiling, condensation and solidification

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Question 72

Evaporation leads to the cooling of a liquid. Which of the following statements correctly explains why this occurs?

A

The fastest-moving molecules escape from the surface of the liquid, reducing the average kinetic energy of the remaining molecules.

B

The slowest-moving molecules escape, leaving behind molecules with higher kinetic energy.

C

All molecules in the liquid have the same energy, but some absorb heat from the air to escape.

D

The liquid molecules react with the air and lose energy.

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2.2.3a Melting, boiling, condensation and solidification Questions

  1. IGCSE
  2. /Physics
  3. /2.2.3a Melting, boiling, condensation and solidification

313 exam-style questions on CIE IGCSE Physics 2.2.3a Melting, boiling, condensation and solidification. Each one has a worked solution and a mark scheme showing where the marks go.

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