Essential Chemistry for IGCSE - Particles And Purification (Section 5 - No. 40)
What happens to the particles of a substance as it changes from a liquid to a gas (evaporation)?
They lose energy and move closer together.
They gain energy and move faster.
They lose energy and stop moving.
They gain energy but move closer together.
Explanation
Evaporation requires the particles to gain energy to overcome the intermolecular forces and change state.
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