Today's most widely used plastic in the form of various products, such as bags, boxes, tubes, most of the film is the origin of petroleum, which includes crude oil. And it is important to human life because it is both a source of energy and a source of raw materials for the production of synthetic materials. Petroleum is found in the State's gas, liquid or solid depending on the temperature, Pressure, And the number or arrangement of the carbon in the molecule. Generally, the hydrocarbons that contain no more than 4 carbon atoms will have a status of gas. If there is a carbon between 5-19 atom will have a status of failed, and if there are 20 or more carbon atoms.
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