Explain the statement: Combustion is an exothermic reaction.
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Explanation:
Combustion is an oxidation reaction that produces heat, and it is therefore alwaysexothermic. All chemical reactions first break bonds and then make new ones to form new materials. ... If the energy released by the new bonds is greater than the energy needed to break the original bonds, the reaction is exothermic.
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Combustion reactions are almost always exothermic (i.e., they give off heat). For example when wood burns, it must do so in the presence of O2 and a lot of heat is produced: Wood as well as many common items that combust are organic (i.e., they are made up of carbon, hydrogen and oxygen).
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