racking heavy hydrocarbons is an example of what sort of reaction?

Cracking heavy hydrocarbons is an example of a chemical reaction, specifically, it is a type of decomposition reaction.

Here are the steps to understand why:

1. Cracking is a process used in the petroleum industry to break down large, complex hydrocarbon molecules into smaller, simpler ones. This is done by applying heat and pressure.

2. The large hydrocarbon molecules are the reactants in this process. They are transformed into smaller hydrocarbon molecules, which are the products.

3. This transformation is a chemical reaction because it involves a change in the substances present before and after the reaction.

4. More specifically, it is a type of decomposition reaction. In a decomposition reaction, a single compound breaks down into two or more simpler substances. In the case of cracking, the large hydrocarbon molecules (the single compound) break down into smaller hydrocarbon molecules (the simpler substances).

So, cracking heavy hydrocarbons is an example of a decomposition reaction.