Step 4 of 4 · topic

Particle model

WJEC 3420QS — matched to your course.

Density, internal energy, heating and changes of state.

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Measuring density

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Subtopics and study areas

  • Measure mass and volume independently, then use ρ = m/V.

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Particle model

Tailored to WJEC 3420QS.

Revision notes are free. Premium unlocks the full question and retrieval-card bank.

Subtopics and study areas

  • Use density, specific heat capacity and latent heat equations.
  • Describe particle arrangements and motion in different states.
  • Explain gas pressure and temperature using particle collisions.
  • Use density and specific heat capacity equations.
  • Describe particle arrangements in solids, liquids and gases.
  • Use a particle model to explain heating and gas pressure.