Here's a breakdown:

* Dehydrogenation: This is a chemical reaction where hydrogen atoms are removed from a molecule.

* Butane: A four-carbon alkane with the formula C4H10.

* Butene: A four-carbon alkene with the formula C4H8. It can exist as several isomers, including 1-butene and 2-butene.

The reaction:

C4H10 (butane) → C4H8 (butene) + H2 (hydrogen gas)

This reaction requires a catalyst, such as a platinum or chromium oxide, and high temperatures.

Uses of butene:

Butene is an important industrial chemical used to make:

* Polyethylene: A common plastic.

* Synthetic rubber: Used in tires and other products.

* Other chemicals: Including butadiene, a key ingredient in synthetic rubber.