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Combustion is an exothermic reaction, generally categorized by the release of energy through heat or light.

A combustion reaction must occur between oxygen and a fuel. The products vary from incomplete to complete combustion. Incomplete combustion occurs under the lack of oxygen, which complete combustion occurs under excess oxygen.

As long as reaction contains a fuel and oxygen, plus the need to heat, it should be a combustion reaction. The common products formed are CO2 and H2O.

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12y ago
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11y ago

A flammable substance can be a liquid, a gas, or a solid. Flammability is the capacity of a substance to burn in the presence of oxygen if it is ignited. The National Fire Protection Association (NFPA) has a grading system for determining the extent of flammability. According to Texas A&M University, a "0" denotes a substance that will not burn, while a material rated a "4" will burn readily. To determine whether a substance is flammable, examine the item itself.

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