A combustion reaction is a reaction in which a substance reacts with oxygen gas, releasing energy in the form of light and heat. Combustion reactions must involve \(\ce{O_2}\) as one reactant. The combustion of hydrogen gas produces water vapor. Notice that this reaction also qualifies as a combination reaction.
Explanation: The process of combustion of any material is the reaction of the material with oxygen gas to produce heat energy and gases. The gases produced in the combustion reactions can vary with the atom present in the material.
During all combustion reaction, energy is produced.
