Pressure of a gas

If the volume of a container with a gas inside stays the same, the pressure of a gas increases as its temperature increases.

The temperature of a gas is a measure of the average kinetic energy of its particles - the higher the temperature, the greater the average kinetic energy.

As a result, the gas particles will be travelling faster and will collide with the walls of the container more frequently, and with more force.

This means that there is a relationship between pressure and temperature. If a pressure gauge is connected to a flask of air and the flask is heated, a graph of pressure against temperature can be produced.

Graph of pressure against temperature. The line starts at 0 degrees C and three units of pressure, rising steadily to six units of pressure at 100 degrees C.
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