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ideal ab.
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a gas composed of molecules on which no forces act except upon collision with one another and with the walls of the container in which the gas is enclosed; a gas that obeys the ideal gas law.
noun
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Also called: perfect gas.
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, especially in thermometry
"Collins English Dictionary — Complete & Unabridged"
2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986
© HarperCollins Publishers 1998, 2000, 2003, 2005,
2006, 2007, 2009, 2012
ideal gas
Scientific
/ ī-dē′əl /
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A hypothetical gas whose molecules bounce off each other (and the boundaries of their container) with perfect elasticity and have negligible size, and in which the intermolecular forces acting between molecules not in contact with each other are also negligible. Such a gas would obey the gas laws (such as Charles's law and Boyle's law) exactly at all temperatures and pressures. Most actual gases behave approximately as ideal gases, except at very low temperatures (when the potential energy of their intermolecular forces is high relative to the kinetic energy of the molecules and becomes significant), and under very high pressures (when the molecules are packed so close together that close-range intermolecular forces become significant).
Etymology
First recorded in 1890–95
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any
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"Knowledge of Bernoulli's law, the ideal gas law, and isothermal expansion are the three ingredients we baked into a model to explore how this device worked," Lipscombe said.
From
Science Daily
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Jan. 23, 2024
What can we learn from this atomic and molecular version of the ideal gas law?
From
Textbooks
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Aug. 12, 2015
The left-hand side of the ideal gas law is PV , which also has the units of joules.
From
Textbooks
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Aug. 12, 2015
In this case, the gas is called an ideal gas, in which case the relationship between the pressure, volume, and temperature is given by the equation of state called the ideal gas law.
From
Textbooks
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Aug. 12, 2015
Wood.—Fuel and oil gas and the future Utopia of improved gas manufacturing.—The ideal gas company of after days.—A valuable and suggestive paper.
From
Scientific American Supplement, No. 648, June 2, 1888.
by Various
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Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
