# Charles-gay-lussac law

From AMS Glossary

## Charles–Gay–Lussac law

(

*Also called*Charles's law, Gay–Lussac's law.) An empirical generalization that in a gaseous system at constant pressure, the temperature increase and the relative volume increase remain in approximately the same proportion for all so-called perfect gases.Mathematically, where

*t*is temperature,*v*is the volume, and*c*is a coefficient of thermal expansion independent of the particular gas. If the centigrade temperature scale is used and*v*_{0}is the volume at 0°C, then the value of the constant*c*is approximately 1/273.