Burning of coal is an oxidation process
Oxidation, any chemical reaction in which an atom of an element loses one or more of its electrons to an atom of a different element.
Familiar examples of oxidation include the burning of coal, which is rapid oxidation and the rusting of iron, which is slow oxidation.
Common examples for oxidation process
Since years, we have been burning coal to get heat. We also know that for burning of coal we need supply of fresh air.
What happens when coal burns? The oxygen from the air is necessary for the process of burning.
We can represent this reaction by the chemical equation as follows:
C + O2 ⟶ CO2 (g)
Carbon dioxide is the product. If sufficient supply of fresh air is not available, the reaction may be as follows:
2C + O2 ⟶ 2CO(g)
Carbon monoxide is the product. The products of burning of coal, both CO2 and CO being gases escape in the atmosphere.
Another common experience is burning of magnesium wire, which is popular in the firework
2Mg + O2 ⟶ 2MgO