When a hydrocarbon burns in oxygen, the reaction will only yield carbon dioxide and water. In complete combustion, the reactant burns in oxygen, producing a limited number of products. Additionally, any combustion in air, which is 78% nitrogen, will also create several forms of nitrogen oxides. In reality, as actual combustion reactions come to equilibrium, a wide variety of major and minor species will be present such as carbon monoxide and pure carbon (soot or ash). For example:Ī simple example can be seen in the combustion of hydrogen and oxygen, which is a commonly used reaction in rocket engines:Ĭomplete combustion is almost impossible to achieve. In a complete combustion reaction, a compound reacts with an oxidizing element, such as oxygen or fluorine, and the products are compounds of each element in the fuel with the oxidizing element. Fuels of interest often include organic compounds (especially hydrocarbons) in the gas, liquid or solid phase. The release of heat can result in the production of light in the form of either glowing or a flame. The flames caused as a result of a fuel undergoing combustion (burning)Ĭombustion or burning is the sequence of exothermic chemical reactions between a fuel and an oxidant accompanied by the production of heat and conversion of chemical species.
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