Jacques Charles first did his work on Charles's law but it remains unpublished.
In 1802 Joseph Louis Gay-Lussac put together the Charles law.
Charles law describes how a gas tends to expand when there is a temperature rise.
Charles law state that the volume occupied by the gas is directly proportional to the Absolute temperature, at constant pressure and mass.
Charles equation can be written as where is the initial volume of gas, is the final volume of gas, is the initial temperature and is the final temperature.