Describe the concept of the absolute zero of temperature and the Kelvin scale of temperature.

For a fixed mass of an ideal gas, volume is proportional to absolute temperature; pressure is proportional to absolute temperature and pressure is inversely proportional to volume.

State the equation of state for an ideal gas.

Students should be aware that an ideal gas is one that has the equation of state PV = nRT and that this equation also defines the universal gas constant R.

Describe the difference between an ideal gas and a real gas. Students should be aware of the circumstances in which real gas behaviour approximates to ideal gas behaviour. Students should also appreciate that ideal gases cannot be liquefied.

Solve problems using the equation of state of an ideal gas.

## Thermodynamics and the Gas laws

Describe the concept of the absolute zero of temperature and the Kelvin scale of temperature.

For a fixed mass of an ideal gas, volume is

proportionalto absolute temperature; pressure isproportionalto absolute temperature and pressure isinversely proportionalto volume.State the equation of state for an ideal gas.

Students should be aware that an ideal gas is one that has the equation of state PV = nRT and that this equation also defines the universal gas constant R.

Images: hyperphysics, Geomeca.com

Describe the difference between an ideal gas and a real gas.

Students should be aware of the circumstances in which real gas behaviour approximates to ideal gas behaviour. Students should also appreciate that ideal gases cannot be liquefied.

Solve problems using the equation of state of an ideal gas.