Changes of State (AQA GCSE Physics): Flashcards
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What happens to mass during a change of state?
What happens to mass during a change of state?
It is conserved
20g liquid evaporates, mass of gas produced
20g liquid evaporates, mass of gas produced
20g
Are changes of state reversible?
Are changes of state reversible?
Yes, they are physical changes, not chemical
Why aren't state changes chemical changes?
Why aren't state changes chemical changes?
Material retains original properties when reversed
Melting
Melting
Solid to liquid
Freezing
Freezing
Liquid to solid
Boiling
Boiling
Liquid to gas
Condensation
Condensation
Gas to liquid
Sublimation
Sublimation
Solid to gas
Deposition
Deposition
Gas to solid
Where does evaporation occur?
Where does evaporation occur?
Only on the surface of the liquid
Why can surface particles evaporate?
Why can surface particles evaporate?
They have enough energy to turn into gas