Section 5: Solids, Liquids, Gases Flashcards
Pressure =
Mass/ volume
Pressure difference =
Height x density x g(10)
What is the effect of pressure on a static particle
It acts equally in all directions
Describe the arrangement and motion of particles in a solid
Particles have a regular pattern, vibrating in fixed positions, particles are next to each other
Describe the arrangement and motion of particles in a liquid
Particles have an irregular pattern, can move past each other, particles further apart than in a solid
Describe the arrangement and motion of particles in a gas
Particles have no pattern of arrangement, move rapidly and randomly, large space between the particles
What is the particle theory
The principle that particles move randomly about a space
What is browniam motion
The evidence for the particle theory
What was the observation of Brownian motion of pollen grains in water
Pollen grains randomly changed direction and speed
What is the explanation for Brownian motion
Invisible and microscopic water particles move erratically themselves, collide with the pollen grains in random directions and speeds, causing them to change speed and direction rapidly and randomly
How do gas molecules exert a pressure?
When gas molecules collide with a container wall, their mo,enter changes, and so the exert a force. As pressure = force/area, so they a so exert a pressure
What is 0 Kelvin
-273*
What happens if you increase the temperature of gas molecules
You increase their kinetic energy
What happens if the temperature of gas is measure on the Kelvin scale
Is proportional to the pressure and kinetic energy
Density =
Mass/ volume
