Fractions that are produced by the distillation of crude oil can go through a process called cracking, a chemical reaction which produces smaller hydrocarbons, including alkanes and alkenes. Ethene and other alkenes are unsaturated hydrocarbons and can be used to make polymers. Cracking Fuels made from oil mixtures containing large hydrocarbon hydrocarbons: Hydrocarbons are a group of compounds which contain the elements hydrogen and carbon. Molecules are not efficient: they do not flow easily and are difficult to ignite.

Cracking is the name given to breaking up large hydrocarbon molecules into smaller and more useful bits. This is achieved by using high pressures and temperatures without a catalyst, or lower temperatures and pressures in the presence of a catalyst. Cracking is an example of a thermal decomposition chemical reaction. Crude Oil - Cracking. This Chemistry quiz is called 'Crude Oil. Cracking (chemistry) In petroleum geology and chemistry, cracking is the process whereby complex organic molecules such as kerogens or long chain hydrocarbons are broken down into simpler molecules such as light hydrocarbons, by the breaking of carbon-carbon bonds in the precursors.

Crude oil often contains too many large hydrocarbon molecules and not enough small hydrocarbon molecules to meet demand. This is where cracking comes in. Cracking allows large hydrocarbon molecules to be broken down into smaller, more useful hydrocarbon molecules.

Forticlient Ssl Vpn Driver Not Installed more. Fractions containing large hydrocarbon molecules are heated to vaporise them. Pcx5 Software. They are then either: • passed over a hot catalyst, or • mixed with steam and heated to a very high temperature.

These processes break chemical bonds in the molecules, causing thermal decomposition reactions. Cracking produces smaller alkanes and alkenes (another type of hydrocarbon).