Edexcel GCSE Chemistry · 1CH0
Specification 2.2, 2.3 · Paper 1
The physical change directly from a solid state to a gas state, without passing through the liquid state.
Revise: Interconversions Between StatesFreezing reverses melting, condensation reverses evaporation or boiling, and deposition reverses sublimation. Familiar water provides several examples: ice melts to form liquid water, liquid water freezes to form ice, and water vapour condenses into liquid droplets on a cold window.
- Revise: Particle Changes During Interconversions
A direct change from solid to gas without becoming liquid.