Charles' Law

This law tells us that volume and temperature share a direct relationship at a constant temperature, the temperature being at Kelvin. To convert from Celsius to Kelvin, you simply add 273.15.




https://www.khanacademy.org/test-prep/mcat/physical-processes/gas-phase/v/charles-law
http://www.chemteam.info/GasLaw/Gas-Charles.html