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2.2.3a Melting, boiling, condensation and solidification

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Question 93

Water is evaporating from an open container at room temperature.

Which statement correctly describes the molecular process of evaporation and its effect on the remaining liquid?

A

Only the molecules with the highest kinetic energy escape from the surface, causing the average kinetic energy of the remaining molecules to decrease.

B

Only the molecules with the lowest kinetic energy escape from the surface, causing the average kinetic energy of the remaining molecules to increase.

C

Any molecule can escape from any part of the liquid, leaving the average kinetic energy of the remaining molecules unchanged.

D

Molecules of any energy can escape but only from the surface, keeping the average kinetic energy of the remaining molecules constant.

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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