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2.2.3a Melting, boiling, condensation and solidification

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Question 204

An open beaker of ethanol is left on a laboratory bench, and the level of the liquid gradually decreases.

Which statement molecularly explains why the liquid level decreases?

A

The least energetic molecules escape from the surface of the liquid and then return.

B

The least energetic molecules escape from the surface of the liquid and do not return.

C

The most energetic molecules escape from the surface of the liquid and then return.

D

The most energetic molecules escape from the surface of the liquid and do not return.

Markscheme

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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