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P3 (particle model and motion and gases (All matter is made up of…
P3
particle model and motion and gases
colliding gas particles creates pressure
free movement allows particles to collide
when this happens it exerts a force this force is pressure
increasing the temperature of a gas can increase pressure
heating gas means it will increase its pressure as it transfers energy into its kinetic energy store
All matter is made up of particles
solids are condensed together in a dense fixed regular pattern
Liquids have a great deal of particle space but some could be together while a lot are separated but in close proximity
Gases have no forces of attraction and the distribution is completely random
density of materials
density depends on what an object is made of
dense materials will have tight arrangements
particle models can explain density
density is a measure of compactness
Density=mass/volume
It relates to mass of a substance and is measured in kg3
Internal energy
Internal energy is stored by particles
a change of state conserves mass
the particles vibrate
gain energy
heating particles gives particles energy
this leads to heat increase and then change in state