In Progress Lesson 1, Topic 1 In Progress The effect of pressure and temperature on particles The effect of pressure when a gas is heated 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 secondThe more frequent the collisions with the container wall the higher the pressure Increasing the temperature makes particles move faster and increases the frequency of collisions with the container wallsTherefore, increasing the temperature increases the pressure if the volume stays constant