Chapter 7 Phase changes and intermolecular forces

This is anything that has mass and takes us space.

• physical properties
• physical changes
• matter
• solid

state of matter that has a fixed volume and a fixed shape

• solid
• liquid
• gas
• phases of matter

What phase change can happen if enough heat energy is added to a solid?

• it melts
• it freezes
• it condenses
• particles slow down

a state of matter that has a definite volume but no definite shape

• solid
• liquid
• gas
• phases

a state of matter that has no definite shape or volume

• solid
• liquid
• gas
• phases

a change of state when a gas becomes a liquid

• melting
• freezing
• condensation
• boiling

a change of state when a solid becomes a liquid

• freezing
• condensation
• boiling
• melting

change of state when a liquid becomes a solid

• evaporation
• condensation
• melting
• freezing

change of state when a liquid becomes a  gas

• evaporation
• condensation
• melting
• freezing

What causes phase changes?

• adding or taking away particles
• adding or taking away matter
• adding or taking away heat energy
• adding or taking away physical properties