Ideal gas

An ideal gas or perfect gas is a hypothetical gas consisting of identical particles of negligible volume, with no intermolecular forces. Additionally, the constituent atoms or molecules undergo perfectly elastic collisions with the walls of the container. The real gases that actually exist do not exhibit these exact properties, although the approximation is often good enough to treat real gases as ideal gases.

Ideal quantum gases

At extremely low temperature or high density, where the thermal wavelength of gas particles is comparable to the distances between them, quantum effects become apparent. Under such conditions, an ideal gas of bosons will be governed by Bose-Einstein statistics and the distribution of energy will be in the form of a Bose-Einstein distribution. An ideal gas of fermions will be governed by Fermi-Dirac statistics and the distribution of energy will be in the form of a Fermi-Dirac distribution.

Related Topics:
Thermal wavelength - Quantum - Bose-Einstein statistics - Bose-Einstein distribution - Fermi-Dirac statistics - Fermi-Dirac distribution

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