Whose law describes the relationship between pressure and temperature at constant volume?

Joseph Louis Gay-Lussac studied gases in the early 19th century and identified this temperature-pressure relationship. If the volume of a gas is kept constant, heating it increases the pressure because molecules move faster and hit the container walls more often and more forcefully. The law is part of the basic gas laws used in chemistry and physics. It is written using absolute temperature, usually in kelvins.