Edexcel IGCSE Physics · Spec 5.6-5.9
Particle Model & Change of State
The particle model of matter and the changes of state.
Physics revision video
Particle Model & Change of State
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Spec 5.6-5.9
What you need to know
- Describe the particle model for the three states
- Explain the changes of state
- Understand specific heat capacity
Active recall
Quick check
Answer each question before opening the answer.
Why is a change of state a physical change?
No new substance is made and it can be reversed — only the arrangement and energy of the particles changes.
During melting or boiling, where does the energy go if the temperature stays constant?
Into breaking the bonds or forces between particles, rather than raising the temperature.
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