It states that, for a given mass of an ideal gas at constant pressure, the volume is directly proportional to its absolute temperatureassuming in a closed system. Cambridge University Press. Guided Tours Gas Statics: So you need to take the air temperature into account when you decide whether or not to refill the tank before your next cook-out. A graph of pressure vs.

A graph of pressure vs.

The French chemist Joseph Gay-Lussac - discovered the relationship between the pressure of a gas and its absolute temperature. From Wikipedia, the free encyclopedia. Plug into the Gay-Lussac's Law Equation.

He observed that volume of a given mass of a gas is inversely proportional to its pressure at a constant temperature.