Why are the processes of combustion of substances classified as chemical?

Why are the processes of combustion of substances classified as chemical? Give examples of the practical application of combustion processes.

During combustion, a chemical reaction occurs, namely the release of gas (for example, oxygen, hydrogen carbon dioxide, etc.)
In the stoves, coal is burned, due to which a high temperature is formed and the room is heated.
Thermal power plants provide us with energy through combustion reactions.



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