ideal gas

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ideal gas

n.
A gas having particles that have perfectly elastic collisions and negligible volume and intermolecular forces, thus exactly obeying the ideal gas law. No known gas is an ideal gas, but actual gases approximate this behavior at relatively low pressure and high temperature.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

ideal gas

n
(Chemistry) a hypothetical gas which obeys Boyle's law exactly at all temperatures and pressures, and which has internal energy that depends only upon the temperature. Measurements upon real gases are extrapolated to zero pressure to obtain results in agreement with theories relating to an ideal gas, esp in thermometry. Also called: perfect gas
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

i·de·al gas

(ī-dē′əl)
A gas in which there is no interaction between the individual molecules. Such a gas would obey the gas laws (such as Charles's law) exactly. No known gas qualifies as an ideal gas.
The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.ideal gas - a hypothetical gas with molecules of negligible size that exert no intermolecular forces
gas - a fluid in the gaseous state having neither independent shape nor volume and being able to expand indefinitely
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
He covers the basic principles of statistics, the Gibbs distribution, the classical ideal gas, quantum ideal gases, condensed matter, superconductivity, fluctuations, phase transitions and critical phenomena, linear response, kinetic equations, and basics of the modern theory of many-particle systems.
As the only company which produces and sells diverse high-purity gases including fluoric, chloric, bromic, and ammoniac gases, SDK offers ideal gases for production processes of its customers.
At this quirky dimension, the chemical potential of both, the Fermi and Bose ideal gases, decreases monotonically with temperature essentially in the same functional way [54], being different only by an additive constant, expressly, the Fermi energy.
Many books do not even mention that this formula only applies for ideal gases and that it can lead to large mistakes with pronounced real gas behavior.