gas

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Related to Gas State: Liquid State, gases

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 ?
The GENSYS model of the air suspension system as shown in Figure 3 has polytrope gas state change [6].
Arkansas and Kentucky, both small states with immense shale gas formations, have the potential to join the ranks of the oil and gas states in coming years.
The thermodynamic processes in the cylinder are described with energy balance equations for the chambers: C and D, the gas state equation and the relations governing the compressible fluid flow through the applied valve.
This is the first of two abridged excerpts from Kate Galbraith and Asher Price's book, The Great Texas Wind Rush: How George Bush, Ann Richards and a Bunch of Tinkerers Helped the Oil and Gas State Win the Race to Wind Power, published by the University of Texas Press.
Oil and gas leasing on state lands: "We will take a look at that, but this isn't just an oil and gas state. We want to catalog all our resources so we know what we have."
Ditto on wind, going so far as to co-write a book on the subject: The Great Texas Wind Rush: How George Bush, Ann Richards, and a Bunch of Tinkerers Helped the Oil and Gas State Win the Race to Wind Power (University of Texas Press).
Gazprom and Kazakhstan's oil and gas state company, KazMunayGaz have agreed to supply gas from the giant oil and gas field Karachaganak in western Kazakhstan to Gazprom's Orenburg gas-processing plant across the border in Russia.
Thousands of these old-style models still exist in remote pastures, but in recent years far taller and more powerful turbines have sprouted atop western mesas, transforming this oil and gas state into the national leader in wind-generated electrical power.
These comprised factories, divisions of oil and gas state concerns, textile, industrial, agricultural and transport enterprises, foreign firms working in Turkmenistan.
-Pillar B: Improve the financial viability and governance of energy SOEs through measures to move electricity tariffs towards regional market prices, while strengthening the protection of vulnerable households to such tariff increases ; to support the rightsizing of staffing of Serbias state electricity generation, distribution and supply utility , thereby improving the financial position of the company; to improve the financial viability of Serbias state gas state - owned natural gas transmission, distributor, and supplier.
Russell Evans, an associate professor of economics at Oklahoma City University, said while the discussion has focused on the best rate for severance taxes, the report will provide lawmakers with context for the tax burden of the industry so it is easier to compare Oklahoma to other oil and gas states.
Importantly, 10% is the discount rate that is derived when analysing Texas Gas's letter to the FERC wherein Texas Gas states the amended contract keeps "Texas Gas financially whole." Generally, Fitch expects contracts of the same vintage as the original Southwestern contract to be succeeded, at their expiry, by lower rate contracts for the medium-term.