Hydrocarbons in Crude Oil

Features of different fractions in fractional distillation to seperate crude oil.

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Small Molecules

Name three features of small molecules/ short hydrocarbon chains:

  • Low boiling point
  • Highly flammable- good for fuel
  • Low viscosity

It has these features because the molecules are small.

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Large Molecules

Name three features of large molecules/ long hydrocarbon chains:

  • High boiling point
  • High viscosity
  • Low flammability

It has these features because the molecules are large.

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Definition of Viscosity

Viscosity is the thickness of the liquid.

e.g. syrup has a high viscosity and water has a low viscosity

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