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CAIE IGCSE Physics Boiling and Evaporation

Practise distinguishing boiling from evaporation through where each occurs, whether bubbles form and whether the process requires a fixed temperature.

Syllabus
2026–2028
Course
Physics 0625

Exam points

  • state that boiling occurs throughout a liquid whereas evaporation occurs at its surface
  • link boiling to a fixed boiling point but evaporation to a range of temperatures
  • identify bubble formation during boiling and cooling of the liquid during evaporation

2.2.3.6—Differences between boiling and question 1

[Maximum number: 2]

Fig. 4.1 shows a metal pan on an electric hotplate. The pan contains 200 cm3200 \mathrm{~cm}^{3} of water.

Fig. 4.1

Fig. 4.1

The pan is heated. The temperature of the water in the pan increases.

State two ways in which boiling differs from evaporation.

1

2

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