Phases of matter Flashcards
Diffusion
The movement of particles
Brownian motion
The random and uncontrolled movement of particles
Freezing point
The temperature at which a liquid is turned into a solid
Melting point
The temperature at which a solid is turned into a liquid
Boiling point
The temperature at which the vapour pressure is equal to the surrounding atmospheric pressure
Solid
Room temperature is smaller than the melting point
Liquid
Melting point is smaller than the room temperature and the room temperature is smaller than the boiling point
Gas
Room temperature is greater than boiling point
Energy during phase change
heated
Temperature rises while in same phase
kinetic energy remains constant during phase change
Heat is transferred and eventually overcomes intermolecular forces
Evaporation
The changing of a liquid into a gas without boiling it
Difference between evaporation and boiling
Boiling only takes place at boiling point
It takes place throughout the substance
Its quicker
The temperature remains constant during boiling
Evaporation takes place at the surface of the liquid
It takes place at temperatures lower than boiling point
Takes place slower
Causes cooling because heat is absorbed into the environment
Condensation
When a gas cools down and turns to a liquid
Sublimation
When a solid turns into a gas
Deposition
When a gas turns into a liquid
