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CO2    
CO2
n 1: a heavy odorless colorless gas formed during respiration
and by the decomposition of organic substances; absorbed
from the air by plants in photosynthesis [synonym: {carbon
dioxide}, {CO2}, {carbonic acid gas}]

Carbonic \Car*bon"ic\, a. [Cf. F. carbonique. See {Carbon}.]
(Chem.)
Of, pertaining to, or obtained from, carbon; as, carbonic
oxide.
[1913 Webster]

{Carbonic acid} (Chem.), an acid {HO.CO.OH}, not existing
separately, which, combined with positive or basic atoms
or radicals, forms carbonates. In common language the term
is very generally applied to a compound of carbon and
oxygen, {CO2}, more correctly called {carbon dioxide}. It
is a colorless, heavy, irrespirable gas, extinguishing
flame, and when breathed destroys life. It can be reduced
to a liquid and solid form by intense pressure. It is
produced in the fermentation of liquors, and by the
combustion and decomposition of organic substances, or
other substances containing carbon. It is formed in the
explosion of fire damp in mines, and is hence called
{after damp}; it is also know as {choke damp}, and
{mephitic air}. Water will absorb its own volume of it,
and more than this under pressure, and in this state
becomes the common soda water of the shops, and the
carbonated water of natural springs. Combined with lime it
constitutes limestone, or common marble and chalk. Plants
imbibe it for their nutrition and growth, the carbon being
retained and the oxygen given out.

{Carbonic oxide} (Chem.), a colorless gas, {CO}, of a light
odor, called more correctly {carbon monoxide}. It is
almost the only definitely known compound in which carbon
seems to be divalent. It is a product of the incomplete
combustion of carbon, and is an abundant constituent of
water gas. It is fatal to animal life, extinguishes
combustion, and burns with a pale blue flame, forming
carbon dioxide.
[1913 Webster]


CO2 \CO2\ (s[=e]"[-o]*t[=oo]`), n.
the chemical formula for {carbon dioxide}, a heavy odorless
gas ({CO2}) formed during respiration and by the combustion
or decomposition of organic substances; it is absorbed from
the air by plants in photosynthesis. The formula itself,
pronounced out, is often used instead of the full name,
especially with reference to fire extinguishers using this
gas for fire suppression; as, a CO2 extinguisher.

Syn: carbon dioxide, carbonic acid gas.
[WordNet 1.5 PJC]

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英文字典中文字典相關資料:
  • Is carbon dioxide slightly or highly soluble in water?
    Carbon dioxide content in air is only 0 03%, but it is highly soluble in water unlike oxygen and one volume of CO2 dissolves in equal volume of water, the solubility being higher at low temperature From European Environment Agency: Carbon dioxide is a colourless, odourless gas, denser than air that occurs naturally in the earth's atmosphere
  • Reaction between NaOH and CO2 - Chemistry Stack Exchange
    So I wanted to know what the reaction between sodium hydroxide and carbon dioxide can be, and upon research I got 2 answers The first one is $$\\ce{CO2 + NaOH(aq) - gt; NaHCO3(aq)}$$ and the seco
  • Hybridization of carbon in CO2 - Chemistry Stack Exchange
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  • Does CO2 dissolve in water? - Chemistry Stack Exchange
    The amount of CO2 dissolved in water is proportional to the outer pressure At 20°C, 1 liter water dissolves about 1 7 g CO2 at normal pressure (1 atm) If the pressure is twice as large, the amount of dissolved CO2 is twice as much, 3 4 g
  • How much CO2 is produced when burning 1GJ of Natural Gas
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    Heating CO2 at atmospheric pressure: At 1000K it is still essentially all CO2 At 2000K: 98% CO2, 1 4% CO, 0 7% O2 At 3000K: 44% CO2, 36% CO, 16% O2, 4% O At 5000K: 50% CO, 50% O only at even higher temperature does significant atomic C appear (9% at 6000K) See Thermal decomposition of carbon dioxide in an argon plasma jet for more information
  • How to Carbonate Stout on Beer Gas? - Homebrew Talk
    Carbonate it with CO2 first Beer gas is mostly nitrogen, which doesn't dissolve very well in beer (hardly at all) Once you get it carbed up to the pressure you want, then switch to Beer Gas The nitrogen pressure is to trip the pressure plate in stout faucets but still keep the Stout at low carb levels About 2 3 of the pressure will come from nitrogen The 1 3 CO2 is to keep the beer
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    My deal with the question: What am I doing wrong in the second method for finding the equivalent weight of $\ce {CO2}$ and if you wanna know why I added the equivalent weights of the elements was because I had read that for finding the equivalent weight of an electrolyte we add the equivalent weights of the cations and anions
  • Why does Co2+ have 7 electrons in the 3d orbital, and not 5 like Mn?
    Why does Co2+ have 7 electrons in the 3d orbital, and not 5 like Mn? Ask Question Asked 11 years, 3 months ago Modified 7 years, 3 months ago
  • How can carbon dioxide be converted into carbon and oxygen?
    CO2 should be heated at room temperature so carbon becomes gaseous and oxygen becomes part of air What the hell are you talking about? That is obvious nonsense and clearly doesn't happen Wha the hell did you mean?





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