P3 : Particle Motion in Gases

Question 1

Pressure of a gas

Answer 1

The pressure of a gas is due to the particles colliding with the walls of the container the gas is being held in
By colliding with the walls of the container the gas particles are exerting a pressure
We can increase pressure by increasing number of collision per second or the energy of each collision

Question 2

Temperature of a gas

Answer 2

The temperature of a gas is related to the average kinetic energy of the particles

Question 3

Low temperature gas

Answer 3

At low temperatures, particles have lower kinetic energy. There are fewer collisions per second. These are lower energy collisions. This means at lower temperatures the gas pressure is relatively low

Question 4

High temperature gas

Answer 4

At high temperatures, particles have higher kinetic energy. There are more collisions per second. These are higher energy collisions. At high temperature, the gas pressure is relatively high