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Edexcel IGCSE Physics 5 9p Melting Evaporation and Boiling Questions

Compare surface evaporation with boiling throughout a liquid, and describe particle changes as solids melt or liquids become gases.

Syllabus
First assessment 2019
Course
Physics 4PH1

Exam points

  • Compare evaporation with boiling: evaporation occurs at the surface and at any temperature, while boiling occurs throughout a liquid at a fixed temperature.
  • Explain melting using particle arrangement and motion: particles stop vibrating about fixed positions and slide past one another as bonds weaken; interpret this change on a heating-curve plateau.
  • Describe liquid-to-gas changes in particle arrangement and motion, including greater separation, faster and more random movement.

Edexcel IGCSE Physics 5 9p Melting Evaporation and Boiling Questions question 1

[Maximum number: 3]

This question is about liquid nitrogen.

Over time, the liquid nitrogen warms up and changes state from a liquid into a gas.

Describe the changes to the arrangement and motion of particles when the liquid nitrogen changes state.

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