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Science
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Number of pages / Number of words: |
3 / 577 |
Essay's paper body
More energy is needed to separate them than short molecules which have only weak forces of attraction for each other.
FOCUS ON FOSSIL FUELS
Petroleum refining
Crude oil is a complicated mixture of hydrocarbons, with a varying composition depending on its source. The hydrocarbons in crude oil have different boiling points, according to the number of carbon atoms their molecules contain and how they are arranged...
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The hydrocarbons in crude oil have different boiling points, according to the number of carbon atoms their molecules contain and how they are arranged. Fractional distillation uses the difference in boiling point to separate the hydrocarbons in crude oil. The fractionating column is cooler at the top than the bottom, so the vapours cool as they rise...
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