Lesson 4, Topic 3
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The effect of pressure and temperature on particles
Lesson Progress
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The volume of a gas depends on its pressure and temperature
Increasing the pressure of a gas will decrease its volume. The opposite is also true – decreasing the pressure will increase the volume
Increasing the temperature of a gas will increase its volume. The opposite is also true – decreasing the temperature will decease the volume
The volume of a gas increases as the pressure decreases
The pressure of a gas is due to the particles colliding with the walls of the container that the gas is held in
If gases are compressed into a smaller volume, there will be more particles hitting the container wall every second
The more frequent the collisions with the container wall the higher the pressure

The pressure of a gas increases as the temperature increases
Increasing the temperature makes particles move faster and increases the frequency of collisions with the container walls
Therefore, increasing the temperature increases the pressure if the volume stays constant
