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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>
Incomplete combustion, typically resulting from a poor oxygen supply, also results in the formation of [[carbon monoxide]] (CO).
The [[carbon]] and [[hydrogen]] in the process come from the breakdown of the combusting material itself, while the oxygen typically comes from the environment.
Combustion is usually [[exothermic]], that is, it liberates more [[energy]] than the [[reaction]] uses.
==References==
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[[Category:Chemistry]]