Charles' Law

Around 1787 Charles did an experiment where he filled 5 balloons to the same volume with different gases. He then raised the temperature of the balloons to 80 °C and noticed that they all increased in volume by the same amount. This experiment was referenced by Gay-Lussac in 1802 when he published a paper on the precise relationship between the volume and temperature of a gas.

An example of this would be during the winter when the temperature goes down outside, your tire pressure goes down, making them look low, while in the summer the temp goes up allowing your tires to return to their form.

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