(gas laws: Gay-Lussac, Amontons, Boyle)

Item no.: P2320160

**Principle**

The state of a gas is determined by temperature, pressure and amount of substance. For the limiting case of ideal gases, these state variables are linked via the general equation of state. For a change of state under isochoric conditions this equation becomes Amontons’ law. In this experiment it is investigated whether Amontons’ law is valid for a constant amount of gas (air).

**Tasks**

– For a constant amount of gas (air) investigate the correlation of

1. Volume and pressure at constant temperature (Boyle and Mariotte’s law)

2. Volume and temperature at constant pressure (Gay-Lussac’s law)

3. Pressue and temperature at constant volume (Charles’ (Amontons’ law))

– From the relationships obtained calculate the universal gas constant as well as the coefficient of thermal expansion, the coefficient of thermal tension, and the coefficient of cubic compressibility.

**What you can learn about**

– Thermal tension coefficient

– General equation of state for ideal gases

– Universal gas constant

– Amontons’ law

Software included. Computer not provided.