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Fractions boil over a range of temperatures much narrower than the original crude oil
What does this suggest about the structures of the hydrocarbons in a fraction?
5 years ago

Chemistry Question asked by Vee

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The hydrocarbons within a fraction have very similar chain lengths and structures. Fractions are produced by the fractional distillation of crude oil which separates this mixture based on the boiling points of compounds.
Answered by [Deleted Member]
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In a fraction the structures of hydrocarbons have very similar numbers and types of bonds ( c-c o-c) and atoms as one another. Therefore, the energy required to overcome the intermolecular forces are similar. As such, the temperature at which the substances become gaseous are more similar. This is what creates the more narrow range.
Answered by Mary Nnenna | 3 years ago
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Generally speaking, narrower temperature range means cleaner fraction.
Answered by [Deleted Member]
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Crude oil is a mixture of hydrocarbons. As the boiling point of hydrocarbons is dependent on the chain length (number of carbon atoms in the chain), it suggests that fractions contain hydrocarbons of a similar length. The longer the chain, the higher the boiling point.
Answered by Erica | 3 years ago
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A narrow range of boling points for each fraction indicates the hydrocarbons are of similar size/length and contain a similar number of carbon atoms.
Answered by Colin | 16 months ago
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