3. Changes in state Flashcards
What happens to a solid when energy is gained?
It melts and becomes a liquid.
What happens to a liquid when energy is gained?
It boils and becomes a gas.
What happens to a gas when energy is lost?
It condenses and becomes a liquid.
What happens to a liquid when energy is lost?
It freezes and becomes a solid.
What is the process called when a solid changes to a liquid?
Melting.
What is the process called when a liquid changes to a gas?
Boiling.
What is the process called when a gas changes to a liquid?
Condensing.
What is the process called when a liquid changes to a solid?
Freezing.
What happens to energy during melting and boiling?
Energy is being gained.
What happens to energy during freezing and condensing?
Energy is being lost.
What is melting?
A solid becoming a liquid by the addition of heat energy.
e.g., ice becoming water.
What is evaporating?
A liquid becoming a gas by the addition of heat energy.
e.g., water becoming water vapour.
What is condensing?
A gas becoming a liquid by removing heat energy.
e.g. water vapour becoming water.
What is freezing?
A liquid becoming a solid by removing heat energy
e.g., water becoming ice.
