Word Finder - gases

definition

Matter in a state intermediate between liquid and plasma that can be contained only if it is fully surrounded by a solid (or in a bubble of liquid) (or held together by gravitational pull); it can condense into a liquid, or can (rarely) become a solid directly.

example

A lot of gas had escaped from the cylinder.

synonyms

• vapor / vapour

definition

A chemical element or compound in such a state.

example

The atmosphere is made up of a number of different gases.

definition

A flammable gaseous hydrocarbon or hydrocarbon mixture (typically predominantly methane) used as a fuel, e.g. for cooking, heating, electricity generation or as a fuel in internal combustion engines in vehicles.

example

Gas-fired power stations have largely replaced coal-burning ones.

definition

A hob on a gas cooker.

example

She turned the gas on, put the potatoes on, then lit the oven.

definition

Methane or other waste gases trapped in one's belly as a result of the digestive process.

example

My tummy hurts so bad, I have gas.

definition

A humorous or entertaining event or person.

example

He is such a gas!

definition

Frothy talk; chatter.

definition

A fastball.

example

The closer threw him nothing but gas.

definition

Arterial or venous blood gas.

definition

Marijuana, typically of high quality.

definition

To kill with poisonous gas.

definition

To talk in a boastful or vapid way; chatter.

definition

To impose upon by talking boastfully.

definition

To emit gas.

example

The battery cell was gassing.

definition

To impregnate with gas.

example

to gas lime with chlorine in the manufacture of bleaching powder

definition

To singe, as in a gas flame, so as to remove loose fibers.

example

to gas thread

definition

Gasoline; a derivative of petroleum used as fuel.

synonyms

• gasoline
• petrol

definition

Gas pedal.

definition

To give a vehicle more fuel in order to accelerate it.

example

The cops are coming. Gas it!

synonyms

• en
• hit the gas
• step on the gas

definition

To fill (a vehicle's fuel tank) with fuel.

synonyms

• refuel

Many of the well-waters contain gases; thus the town of Roma is lighted by natural gas which escapes from its well.

They have made this observation the basis of a practical method of separating helium from the other inert gases.

They involve high cost in fuel and labour, but permit the utilization of the waste gases.

Dalton, who was a mathematical physicist even more than a chemist, had given much thought to the study of gases.

This phenomenon is connected with the fact that incandescent bodies, especially in rarefied gases, throw off or emit electrons or gaseous negative ions.

He denied that gaseous atoms could have parts, although compound gases could.

Gases formerly considered to be identical came to be clearly distinguished, and many new ones were discovered.

This view is confirmed by experiments in which other gases are substituted for air as the environment of colliding jets.

Whit to congressional mirror was placed inert gases in.

In 1875 Lord Rayleigh published an investigation on "the work which may be gained during the mixing of gases."

But his theological writings are forgotten, and he is chiefly remembered as a scientific investigator who contributed especially to the chemistry of gases.

While successfully investigating the solid elements and their compounds gravimetrically, Berzelius was guilty of several inconsistencies in his views on gases.

A masterly device, initiated by him, was to collect gases over mercury instead of water; this enabled him to obtain gases previously only known in solution, such as ammonia, hydrochloric acid, silicon fluoride and sulphur dioxide.

The low percentage of sulphur in the roasted ore is little more than enough to produce a matte of 40 to 45%, and therefore the escaping gases are better fitted than those of most copper cupola furnaces for burning in a stove.

It is believed Mr Blair will outline key future policies aimed at curbing the emission of the greenhouse gases that cause global warming.

Wet or dry flue gas desulphurisation systems reduce emissions of volatile elements by concentrating the elements from flue gas desulphurisation systems reduce emissions of volatile elements by concentrating the elements from flue gases in solid or liquid streams.

How will the climate change in response to rising levels of greenhouse gases?

But these protective layers are in the main impermeable by gases and by either liquid or vapour, and prevent the access of either to the protoplasts which need them.

Investigations carried out by Blackman, and by Brown and Escombe, have shown clearly that the view put forward by Boussingault, that such absorption of gases takes place through the cuticular covering of the younger parts of the plant, is erroneous and can no longer be supported.

The entry of gases into, and exit from, the cells, as well as the actual exhalation of watery vapour from the latter, take place in the intercellular space system of which the stomata are the outlets.

This power of varying the area of the apertures by which gases enter the internal reservoirs is not advantageous to the gaseous interchangesindeed it may be directly the reverse.

Care and intelligence are especially needful with certain insecticides such as poisonous gases, or the operators may suffer.

Submerged leaves are usually filamentous or narrowly ribbonshaped, thus exposing a large amount of surface to the water, some of the dissolved gases of which they must absorb, and into which they must also excrete certain gases.

The difference of pressure between the outside air and the smoke-box gases may be measured by the difference of the water levels in the limbs of a U tube, one limb being in communication with the smokebox, the other with the atmosphere.

He initiated in 1866 the spectroscopic observation of sunspots; applied Doppler's principle in 1869 to determine the radial velocities of the chromospheric gases; and successfully investigated the chemistry of the sun from 1872 onward.

In the newer type (which was first proposed by Andrews for the combustion of gases) the chemical action takes place in a completely closed combustion chamber of sufficient strength to resist the pressure generated by the sudden action, which is often of explosive violence.

To withstand the chemical action of the gases, the " calorimetric bomb " is lined either with platinum, as in Berthelot's apparatus, or with porcelain, as in Mahler's.

Arago, with whom he had already carried out investigations on the refractive properties of different gases, in the measurement of an arc of the meridian in Spain, and in subsequent years he was engaged in various other geodetic determinations.

It may be more conveniently prepared by passing the vapour of sulphur over red hot charcoal, the unccndensed gases so produced being led into a tower containing plates over which a vegetable oil is allowed to flow in order to absorb any carbon bisulphide vapour, and then into a second tower containing lime, which absorbs any sulphuretted hydrogen.

Like most of the other metals of the group, it absorbs gases.

To the physicist matter is presented in three leading forms - solids, liquids and gases; and although further subdivisions have been rendered necessary with the growth of knowledge the same principle is retained, namely, a classification based on properties having no relation to composition.

The first step in this direction was effected by the co-ordination of Gay Lussac's observations on the combining volumes of gases.

He discovered that gases always combined in volumes having simple ratios, and that the volume of the product had a simple ratio to the volumes of the reacting gases.

A second inconsistency was presented when he was compelled by the researches of Dumas to admit Avogadro's hypothesis; but here he would only accept it for the elementary gases, and denied it for other substances.

In de Lambilly's process air and steam is led over white-hot coke, and carbon dioxide or monoxide removed from the escaping gases according as ammonium formate or carbonate is wanted.

At all times the air had received attention, especially since van Helmont made his far-reaching investigations on gases.

There is a fourth law of chemical combination which only applies to gases.

The 18th century witnessed striking developments in pneumatic chemistry, or the chemistry of gases, which had been begun by van Helmont, Mayow, Hales and Boyle.

The limiting law expressing the behaviour of gases under varying temperature and pressure assumes the form pv= RT; so stated, this law is independent of chemical composition and may be regarded as a true physical law, just as much as the law of universal gravitation is a true law of physics.

Of considerable importance, also, are the properties of solids, liquids and gases in solution.

This is readily illustrated by considering the properties of gases - the simplest state of aggregation.

According to the law of Avogadro, equal volumes of different gases under the same conditions of temperature and pressure contain equal numbers of molecules; therefore, since the density depends upon the number of molecules present in unit volume, it follows that for a comparison of the densities of gases, the determinations must be made under coincident conditions, or the observations reduced or re-computed for coincident conditions.

This equation, which is mathematically deducible from the kinetic theory of gases, expresses the behaviour of gases, the phenomena of the critical state, and the behaviour of liquids; solids are not accounted for.

It is found that mercury vapour, helium, argon and its associates (neon, krypton, &c.) have the value 1.67; hence we conclude that these gases exist as monatomic molecules.

Oxygen, nitrogen, hydrogen and carbon monoxide have the value 1.4; these gases have diatomic molecules, a fact capable of demonstration by other means.

In the more complex gases the specific heat varies considerably with temperature; only in the case of monatomic gases does it remain constant.

Laplace is due the theoretical proof that this function is independent of temperature and pressure, and apparent experimental confirmation was provided by Biot and Arago's, and by Dulong's observations on gases and vapours.

P. Dale; the more simple formula (n - i)/d, which remained constant for gases and vapours, but exhibited slight discrepancies when liquids were examined over a wide range of temperature, being adopted.

The process was developed by Madame Lefebre in 1859; by Meissner in 1863, who found that moist gases gave a better result; and by Prim in 1882, who sparked the gases under pressure; it was also used by Lord Rayleigh in his isolation of argon.

The first product of the reaction is nitric oxide, which on cooling with the residual gases produces nitrogen peroxide.