P6.2 - States Of Matter (Finished) Flashcards
Changes of state are an example of what type of change?
Physical changes
Why are changes of state an example of physical changes?
Because no new substances are produced
What does the conservation of mass tell us?
When a substance changes state, the number of particles in the substance stays unchanged, and therefore also the mass
What happens to a substance when a physical change is reversed?
It recovers it’s original properties
Which state(s) of matter have fixed volumes?
Liquid and solid
Which state(s) of mater can flow?
Liquid and gas
Do liquids have a fixed shape?
No, they fit the container shape
Do gases fit the container shape?
No they fill it
Order solid gas liquid in density (high to low)
Solid, liquid, gas
Order solid, liquid, gas in amount of energy the particles have (high to low)
Gas, liquid, solid
Why is the density of a gas much less than that of a solid or liquid?
The particles of a gas move about at random so on average they are much further appart
What is the change of state from gas to solid called?
Deposition
What is the change of state from solid to gas called?
Sublimation
Why can a liquid flow?
The particles of a substance in its liquid state are in contact with each other but move about at random which lets them flow
Why is the density of a gas much less than that of a solid or liquid?
It’s particles move about at random at great speed so they are on average much further appart than those in a liquid
