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Combustion reactions always include O2 (Oxygen Gas) and a hydrocarbon (hydrogen and carbon) and the products are always CO2 and H2O. So, for example, you have C200H108 + O2 then the products will still be CO2 and H2O.

It is considered an exception because normally, in chemical equations, the amount of reactants have to equal the amount of products.

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Why are combustion reactions considered exceptions to the rules of chemical reactions?

Combustion Reactions are always reacted with Oxygen gas in this case if you had C3H8+O2 you will ALWAYS get H2O+CO2 it does not matter if you have C100H54+O2 you will still get H2O+CO2 this is why combustion reactions are considered exceptions to the rules of a product or chemical reaction.


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Related Questions

Why are combustion reactions considered exceptions to the rules of chemical reactions?

Combustion Reactions are always reacted with Oxygen gas in this case if you had C3H8+O2 you will ALWAYS get H2O+CO2 it does not matter if you have C100H54+O2 you will still get H2O+CO2 this is why combustion reactions are considered exceptions to the rules of a product or chemical reaction.


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