Difference between revisions of "Combustion reactions"

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'''Combustion reactions''' are those in which [[oxygen]] (O<sub>2</sub>) is added while [[carbon dioxide]] (CO<sub>2</sub>) and [[water]] (H<sub>2</sub>0) are produced.<ref>Wile, Dr. Jay L. ''Exploring Creation With Chemistry''. Apologia Educational Ministries, Inc. 1998</ref>
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'''Combustion reactions''' (informally known as simply ''burning'') are chemical reactions in which a substance is reacted [[exothermic]]ally with molecular [[oxygen]] (O<sub>2</sub>) at a high temperature. Combustion reactions can either be ''complete'' or ''incomplete''.<ref name="ref1">What is combustion? [http://www.habmigern2003.info/1_combustion.html]</ref>
  
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Incomplete combustion, typically resulting from a poor oxygen supply, also results in the formation of [[carbon monoxide]] (CO).
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In ideal circumstances, all reactions would be complete; or in other words, oxygen would fully [[oxidize]] the other [[reactant]]s. For example, a combustion reaction involving a [[hydrocarbon]] (any molecule consisting only of carbon and hydrogen) would result in only carbon dioxide (CO<sub>2</sub>) and and water (H<sub>2</sub>O) as products (possibly with excess oxygen).
  
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The [[carbon]] and [[hydrogen]] in the process come from the breakdown of the combusting material itself, while the oxygen typically comes from the environment.
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In the real world, however, combustion reactions rarely go to completion. This is due to imperfect conditions, such as insufficient oxygen or low ignition temperature.<ref name="ref1" /> Incomplete combustion results in additional products which are not fully oxidized. For example, an incomplete combustion reaction involving a hydrocarbon would include [[carbon monoxide]] (CO) as a product, along with carbon dioxide and water.
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Combustion is usually [[exothermic]], that is, it liberates more [[energy]] than the [[reaction]] uses.
 
  
 
==References==
 
==References==

Revision as of 03:06, July 23, 2007

Combustion reactions (informally known as simply burning) are chemical reactions in which a substance is reacted exothermically with molecular oxygen (O2) at a high temperature. Combustion reactions can either be complete or incomplete.[1]

In ideal circumstances, all reactions would be complete; or in other words, oxygen would fully oxidize the other reactants. For example, a combustion reaction involving a hydrocarbon (any molecule consisting only of carbon and hydrogen) would result in only carbon dioxide (CO2) and and water (H2O) as products (possibly with excess oxygen).

In the real world, however, combustion reactions rarely go to completion. This is due to imperfect conditions, such as insufficient oxygen or low ignition temperature.[1] Incomplete combustion results in additional products which are not fully oxidized. For example, an incomplete combustion reaction involving a hydrocarbon would include carbon monoxide (CO) as a product, along with carbon dioxide and water.

References

  1. ↑ 1.0 1.1 What is combustion? [1]