Changes of State (OCR GCSE Physics A, Combined (Gateway Science Suite)): Flashcards
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What happens to mass during a change of state?
What happens to mass during a change of state?
Mass is conserved
Mass of gas when 20g liquid evaporates
Mass of gas when 20g liquid evaporates
20g (mass is conserved)
Are changes of state reversible?
Are changes of state reversible?
Yes, physical changes are reversible
Why state changes aren't chemical changes
Why state changes aren't chemical changes
Material retains its original properties when reversed
Where evaporation occurs in a liquid
Where evaporation occurs in a liquid
Only on the surface
Why do only surface particles evaporate?
Why do only surface particles evaporate?
Only they have enough energy to turn into a gas
Melting process
Melting process
Solid to liquid
Freezing process
Freezing process
Liquid to solid
Boiling process
Boiling process
Liquid to gas
Condensation process
Condensation process
Gas to liquid
Sublimation process
Sublimation process
Solid to gas
Deposition process
Deposition process
Gas to solid
Temperature during melting or boiling
Temperature during melting or boiling
Stays constant (plateau on graph)