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Combustion reaction, illustration
Combustion reaction. Illustration of the molecular changes that take place during combustion (burning). At left are two oxygen molecules (red) and a hydrocarbon (black and white), in this case methane (CH4), which is the fuel. When the molecules are exposed to a high enough temperature their bonds break (centre) and the atoms recombine (right) to form carbon dioxide (red and black) and water (red and white) molecules.
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