Combustion Reactions PDF
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This document provides an overview of combustion reactions, focusing on hydrocarbons. It discusses complete and incomplete combustion, as well as the products formed in each type. The document also touches on the role of oxygen and the impact of impurities in fuel on the combustion process, relevant to chemistry.
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The Combustion of Hydrocarbons Background Organic Compound: a molecular compound containing one or more carbon-carbon bonds. Many organic compounds contain one or more carbon-hydrogen bonding. Manny fuels contain impurities such as sulfur compounds and heavy metals. These i...
The Combustion of Hydrocarbons Background Organic Compound: a molecular compound containing one or more carbon-carbon bonds. Many organic compounds contain one or more carbon-hydrogen bonding. Manny fuels contain impurities such as sulfur compounds and heavy metals. These impurities cause air pollution The burning of hydrocarbons is a large contributing factor to the release of carbon dioxide into the atmosphere. Carbon dioxide is one greenhouse gas that contributes to climate change and so does the water vapour. Combustion reactions We classify the combustion of hydrocarbons as either complete combustions incomplete combustions depending on the products that form Complete Combustion Reaction Requires the presence of oxygen for complete combustion. Oxygen supply is plentiful. The reactants are any material and oxygen The general equation for a complete combustion reaction of a hydrocarbon is: Hydrocarbon + oxygen → carbon dioxide + water C3H8 (g) + O2 (g) → CO2 (g) + H2O (g)+ energy C3H8 (g) + 5O2 (g) → 3CO2 (g) + 4H2O (g) The general equation for a combustion reaction of an element is: compound + oxygen → oxides of the compound S8 (s) + 8O2 (g) → 8SO2 (g) Incomplete Combustion Combustion of a hydrocarbon occurs when the supply of oxygen is limited. It is said to be “fuel rich” Flames from incomplete combustion are often yellow, sooty and considerably cooler than flames from complete combustion. They produce a wider range of products and are generally represented by more than one chemical equation Incomplete combustion of Heptane Hydrocarbon + oxygen → carbon + carbon monoxide + carbon dioxide + water + E C7H16 (g) + 7O2 (g) → 3C(s) + 2CO (g)+ 2CO2 (g)+ 8H2O (g) + energy C7H16 (g) + 8O2 (g) → 6CO (g)+ CO2 (g)+ 8H2O (g) + energy Using page 194-195 address the concerns related to incomplete combustion
