The Effects of Temperature & Pressure
Chemistry: Cambridge International GCSE Supplement, topic 1.1.4
Properties of Gases
All gases tend to have similar properties and behave in similar ways.
Temperature of gases
- The higher the temperature of a gas, the higher the kinetic energy of the gas' particles.
- As you heat a gas, you transfer more kinetic energy to the gas' particles.
- This increases the speed of the particles.
Pressure of gases
- A gas exerts pressure on the walls of its container.
- There are lots of gas particles colliding with the container each second.
- When a gas particle collides with the wall of its container, its momentum changes and it bounces back off the wall.
- This exerts a force on both the particle and the wall.
- The pressure exerted on the wall is equal to the force (of the ball) per unit area (of the wall being hit).
Test yourself on The Effects of Temperature & Pressure
A student says that a gas exerts pressure on a container because of the particles colliding with one another in the container, and the particles colliding with the walls of the container.
Is the student correct?