Edexcel IGCSE Physics 5.9P Melting, evaporation & boiling
Practise explaining melting, evaporation and boiling using particle motion, bonds, surfaces and constant-temperature graph sections.
- Syllabus
- First assessment 2019
- Course
- Physics 4PH1
Exam points
- compare evaporation and boiling by temperature condition and whether change occurs at the surface
- explain melting from a graph plateau using weakened bonds and changing particle arrangement
5.9P Melting, evaporation and boiling 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.
Any three from:
- particles are far apart / much further apart
- particles move with much higher speed / have higher kinetic energy
- particles move more randomly
Accept:
- KE for kinetic energy
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