## The Law of Gay-Lussac

When the temperature of a gas changes from 0°C by one degree, the volume changes by 1/273 of the original value:

or

From this law, Lord Kelvin founded the absolute scale for the temperature, in which 0 Kelvin = absolute zero = 273.15 degrees Celsius.

Thermodynamic Temperature T

in Kelvin [K]

in Kelvin [K]

373.15

273.15

263.15

10

0

Celsius Temperature in [0°C]

100

0

-10

-263.15

-273.15

Boyles' Law

describes the relationship between volume and pressure, where temperature and mass (number of particles) must stay constant.

Charles' Gesetz

describes the relationship between volume and temperature, where pressure and mass stay constant.

Avogadro's Law

describes the relationship between volume and mass, where temperature and pressure stay constant.

The above three law´s combine to give the universal gas law: