Describe why only specific gravity of crude oil is not sufficient to classify all crude oils?
Describe why only specific gravity of crude oil is not sufficient to classify all crude oils?
When crude oil is discovered, there is no one single variety found. It exists in a number of varying forms, and the composition it is found in determines how it is transported and refined. Crude is classified by both physical and chemical characteristics.
Crude oil is a mixture of comparatively volatile liquid hydrocarbons (compounds composed mainly of hydrogen and carbon), though it also contains some nitrogen, sulfur, and oxygen. Those elements form a large variety of complex molecular structures, some of which cannot be readily identified. Regardless of variations, however, almost all crude oil ranges from 82 to 87 percent carbon by weight and 12 to 15 percent hydrogen by weight.
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