What is the Difference Between Decomposition and Combustion?

Decomposition and combustion are two different types of chemical reactions. Here are the main differences between them:

Decomposition:

1. Decomposition is a natural process that occurs when a single substance breaks down into multiple substances, usually simpler compounds.
2. This process is often carried out by decomposers like invertebrates, fungi, and bacteria.
3. Decomposition serves the purpose of recycling material and providing nutrients and space for new organisms.
4. One example of decomposition is the breakdown of dead animals and plants, which are converted into smaller pieces and ultimately into simpler compounds.

Combustion:

1. Combustion is an exothermic chemical reaction that produces heat by the reaction between a fuel and an oxidant, usually oxygen.
2. In combustion, the starting material is converted into other forms of compounds while producing heat.
3. The primary goal of combustion is to generate energy.
4. Examples of combustion include burning wood or coal for residential needs, using petrol or diesel in vehicles, and cooking with natural gas or liquefied petroleum gas (LPG).

In summary, decomposition is a natural process that involves the breakdown of complex materials into simpler compounds, while combustion is a chemical reaction that generates heat and energy by combining a fuel with an oxidant.

Comparative Table: Decomposition vs Combustion

Here is a table comparing decomposition and combustion reactions:

It is possible for a decomposition reaction to also be a combustion reaction if oxygen is one of the products formed during the decomposition.