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Chemistry's Most Wanted
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Chemistry's Most Wanted
Description of Suspect and Behavior (Description of Reaction & General Equation)
A combustion reaction is when all substances in a compound are combined with oxygen, which then produces carbon dioxide and water. Combustion is commonly called burning. It is an exothermic reaction, which means heat is produced and is easily distinguished. Combustion occurs predominantly in automobiles, homes, and in factories.
Examples Illustrating the behavior (Equations)
CH4[g] + 2 O2[g] -> CO2[g] + 2 H2O[g] + energy
2H2+ O2 --> 2H2O
C6H12O6 + 6O2 ---> 6CO2 + 6H2O
C10H8 + 12 O2 ---> 10 CO2 + 4 H2O
C21H24N2O4 + O2 ---> CO2 + H2O + NO2
C2H5SH + O2 ---> CO2 + H2O + SO2
2C2 H6 + 7O2 ---> 4CO2 + 6H2 O
C4 H8 + 6O2 --->4CO2 + 4H2 O
C3H8 + 5 O2 ---> 3 CO2 + 4 H2O
Real-Life examples showing this behavior and documentation (with equations and video/picture)
gasoline + air ---> CO2 + water
Cellular Respiration: Process where the cells in our bodies obtain energy
C6H12O6 + 6O2 => 6CO2 + 6H2O + energy (glucose + oxygen = carbon dioxide + water + energy)
Complete combustion of methane
Methane + oxygen => carbon dioxide and water
CH4 + 2O2 => CO2 + 2H2O
Incomplete combustion of methane gas producing carbon monoxide
methane + oxygen ---> carbon and water
CH4 + O2 ---> C + 2H2O
U.S. industries rely on combustion systems for heat and steam generation. The systems enable indispensable industrial processes, such as heating metals and chemical feedstocks, as well as the ability to change the mechanical and chemical properties of materials. Major end users include energy-intensive industrial sectors, such as petroleum, metals, and forest products.
C + O2
CH4 + 2O2
CO2 + 2H2O
(Buring of Coal)
Complete combustion of fossil fuels:
Fossil fuels are made up of hydrocarbons. Hydrocarbons are compounds that contain the elements hydrogen and carbon. Examples are methane, CH4, propane, C3H8, butane, C4H10 and octane, C8H18Hydrocarbons readily burn or undergo combustion reactions.Combustion may be complete or incomplete.
Complete combustion of fossil fuels results the production carbon dioxide and water. The incomplete combustion of fossil fuels results in the formation of carbon monoxide and soot (carbon).
Re-creation of the crime (Student experiment illustrating the reaction with video)
David Mellott and Thomas Roberts
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