A hydrocarbon is any organic compound composed solely
of carbon and Hydrogen. Hydrocarbons include aliphatic
compounds, in which the carbon atoms form a chain,
and Aromatic Compounds, in which the carbon atoms
form stable rings.
The aliphatic group is divided
into alkenes (e.g. Methane and propane), alkenes and
alkynes, depending on whether the molecules of the
compounds contain, respectively, only single bonds,
one or more carbon-carbon double bonds, or one or
more carbon-carbon triple bonds.
yields useful fractions that are hydrocarbon mixtures,
e.g. Natural Gas, Gasoline, Kerosene, Home heating
oil, Lubricating oils, Paraffin, and asphalt.
Tar is also a source of hydrocarbons. Hydrocarbon
derivates contain additional elements, e.g. oxygen,
and include Alcohols, aldehydes, ketones, carboxylic
acids, and halocarbons.