WordNet
n. a hypothetical gas with molecules of negligible size that exert no intermolecular forces [syn: ideal gas]
Wikipedia
In physics, a perfect gas is a theoretical gas that differs from real gases in a way that makes certain calculations easier to handle. Its behavior is more simplified compared to an ideal gas (also a theoretical gas). In particular, intermolecular forces are neglected, which means that one can use the ideal gas law without restriction and neglect many complications that may arise from the Van der Waals forces.
Usage examples of "perfect gas".
It's behaving just the way that a perfect gas is supposed to behave.
Its nice to think about, admitted Sheerin, as a pretty abstraction -- like a perfect gas, or absolute zero.
It is quite comparable to the Gay-Lussac law relating to the variation of the density of a perfect gas with the temperature.
Its nice to think about, admitted Sheerin, as a pretty abstraction like a perfect gas, or absolute zero.