1.3 Particles closely packed in a
1.3.1 Strong forces between particles
1.4 Vibrate in fixed positions
2.1 No definite shape
2.1.1 Denser than gases
2.2 Still attraction
2.3 No fixed arrangement
3.1 Particles spread out with large
spaces between them
3.1.1 Expand to fill all available space
3.2 Forces holding them
together are small
3.2.1 Bump into the walls of the container
3.3 Can be compressed
4 Brownian Motion
4.1 Particles of fluids are continuously bumping into each other and into tiny
particles. Sometimes there will be more collisions on one side of the pollen
grain than on another, and this will make the pollen grain change its
direction or speed of movement.
5 Boyle's Law
5.1 Air is squashy! Wow!
5.2 Robert Bowle noticed that air can be squashed and then springs
back to its original volume when you release it.
5.2.1 Pressure is the force acting per unit area. This is measured
in N/m2 = one N/m2 is called a Pascal
188.8.131.52 He noticed that when he DOUBLED the
pressure, the volume of the gas HALVED
184.108.40.206 Pressure is proportional to 1/v
220.127.116.11 p1V1 = p2V2
18.104.22.168 If you take a fixed mass of gas that has a pressure 1 and a volume 1,
and change either the pressure or the volume, the formula applies.
22.214.171.124.1 If the same number of particles are squeezed into a smaller volume, they
will hit the container walls more often. More collisions per second means a
greater average force on the wall and therefore = a GREATER pressure.
6 Absolute Zero
6.1 He conducted his experiment at a constant temperature because he
knew that temperature also had an effect on the pressure.
6.1.1 Pressure of the gas increases as the temperature increases.
126.96.36.199 Absolue zero is approximately -273º C and that's when the
pressure of the gas cannot possibly go down further.
6.2 temperature in K = temperature in ºC + 273
6.2.1 Pressure of the gas is proportional to its Kelvin temperature.