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2.2.3a Melting, boiling, condensation and solidification

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Question 81

A runner perspires during a race, leaving sweat (primarily water) on their skin.

Here are three statements about the process of evaporation and its effects:

  • (X) The liquid sweat requires thermal energy to evaporate.
  • (Y) The sweat absorbs this thermal energy from the runner's body.
  • (Z) The temperature of the runner's skin decreases as a result.

Which statements are correct?

A

(X) and (Y) only

B

(X) and (Z) only

C

(Y) and (Z) only

D

(X), (Y) and (Z)

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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