Internal Energy (AQA GCSE Physics Combined Science): Flashcards
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13 cards from this deck
What is internal energy?
What is internal energy?
Energy stored by particles in a system
Two forms of internal energy
Two forms of internal energy
Kinetic energy & potential energy
Effect of heating on internal energy
Effect of heating on internal energy
Heating increases internal energy
Two outcomes of increased internal energy
Two outcomes of increased internal energy
Raises temperature OR causes change of state
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
What happens to mass during changes of state?
What happens to mass during changes of state?
Mass is conserved
Nature of changes of state
Nature of changes of state
Physical changes that are reversible
What is evaporation?
What is evaporation?
Liquid to gas on surface of liquid only
Why does evaporation occur at surface only?
Why does evaporation occur at surface only?
Only surface particles have enough energy