gas

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Related to Gass: Gauss, guess, Gauß

gas,

in physics, one of the three commonly recognized states of matter, the other two being solid and liquid. A substance in the gaseous state has neither definite shape nor definite volume. Like liquids, gases are fluids and assume the shape of their containers. Unlike liquids, they will expand to fill any container, regardless of its size. All gases condense into liquids or solids when sufficiently cooled or compressed (see compressioncompression,
external stress applied to an object or substance, tending to cause a decrease in volume (see pressure). Gases can be compressed easily, solids and liquids to a very small degree if at all.
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; condensationcondensation,
in physics, change of a substance from the gaseous (vapor) to the liquid state (see states of matter). Condensation is the reverse of vaporization, or change from liquid to gas.
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; liquefactionliquefaction,
change of a substance from the solid or the gaseous state to the liquid state. Since the different states of matter correspond to different amounts of energy of the molecules making up the substance, energy in the form of heat must either be supplied to a substance
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). Most gases first liquefy, but some pass directly into the solid state (see sublimationsublimation
, change of a solid substance directly to a vapor without first passing through the liquid state. The term is also used to describe the reverse process of the gas changing directly to the solid again upon cooling.
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); carbon dioxide, for example, can condense into dry ice. Some gases are extremely soluble in certain liquids, the liquid absorbing many times its own volume of gas. Some solids, by a process called adsorption, can take up many times their own volume of certain gases. The behavior of gases under various conditions of pressure, temperature, and volume is described by the various gas lawsgas laws,
physical laws describing the behavior of a gas under various conditions of pressure, volume, and temperature. Experimental results indicate that all real gases behave in approximately the same manner, having their volume reduced by about the same proportion of the
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. Many of the properties of gases can be understood by considering the fact that only a small part of the volume of a gas is occupied by its atoms or molecules, which are in rapid, random motion. See kinetic-molecular theory of gaseskinetic-molecular theory of gases,
physical theory that explains the behavior of gases on the basis of the following assumptions: (1) Any gas is composed of a very large number of very tiny particles called molecules; (2) The molecules are very far apart compared to their sizes,
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.

Gas

A state of matter, including natural gas and propane, used as a fuel to produce energy, generally for lighting and heating.

gas

[gas]
(materials)
(ordnance)
To expose to a war gas.
(physics)
A phase of matter in which the substance expands readily to fill any containing vessel; characterized by relatively low density.

gas

1. a substance in a physical state in which it does not resist change of shape and will expand indefinitely to fill any container. If very high pressure is applied a gas may become liquid or solid, otherwise its density tends towards that of the condensed phase
2. any substance that is gaseous at room temperature and atmospheric pressure
3. any gaseous substance that is above its critical temperature and therefore not liquefiable by pressure alone
4. 
a. a fossil fuel in the form of a gas, used as a source of domestic and industrial heat
b. (as modifier): a gas cooker
5. a gaseous anaesthetic, such as nitrous oxide
6. the usual US, Canadian, and New Zealand word for petrol, a shortened form of gasoline
7. US an informal name for flatus

gas

References in periodicals archive ?
Gass made light of the gathering, tweeting Monday: "Protest by a few Basiji students C* Burned the Union Jack but at least got it the right way up this time.
John Glenn went up on top of an Atlas rocket, and we still build them today," said Gass, who before joining ULA as president and CEO served as vice president and general manager of space transportation for Lockheed Martin, overseeing the Atlas, Titan and other space launch projects.
Unlike those who ooze pessimism when discussing nursing home care, Gass tempers his insights with optimism.
Kyle Gass, left, and Jack Black are on a mission to rock you.
This theme runs through much of Rilke's work, and Gass is, obviously, not unaware of it.
This disparity represents a kind of elitism that Gass is sometimes capable of.
Six partners and one associate from Dionne & Gass LLP will join Saul Ewing.
Invitation to tender : Education Area Expansion Except Gass
TEHRAN (FNA)- British envoy to the Iran-world powers nuclear talks, Simon Gass, held several meetings with Iranian officials in Tehran to discuss various aspects of improvement of Tehran-London ties, and explored new avenues for enhancing their common understanding of crucial regional and international developments.
Gass arrived in Kandahar City a day after Security Transition Commission Chairman Dr.
Last year's winner, 23-year-old Darren Gass, will return to defend his title however stiff opposition will come from 11 times winner and Lurgan Park master Kenny McKinstry, multiple Irish Rally Champion Derek McGarrity, former Rallycross Champion Denis Biggerstaff and the ever reliable Kevin Barrett.
She leaves her husband of 64 years, Sidney Short, a son, Steven Short and his wife Fran of Manchester, NH; a daughter, Sandra wife of Robert Gass of Holden; two sisters: Sadie Shapiro of Worcester and Symme Kramer of Saverna Park, MD; her grandchildren: Alisa wife of Ryan James of Pittsburgh, Jeffrey Gass and his wife Samantha of Holden, S.