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A combustion reaction is when a substance reacts with oxygen and releases a huge amount of energy in the form of light and heat. Acombustion reaction always has oxygen as one reactant. The second reactant is always a hydrocarbon, which is a compound made up of carbon and hydrogen.
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It often burns the first element.
second reactant is oxygen.
example:- c + o2 = co2
carbon burns to carbon dioxide
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