Petroleum - A Mixture of Hydrocarbons
Chemistry: Cambridge International GCSE Supplement, topic 11.3.4
Petroleum: A Mixture of Hydrocarbons
Petroleum is a natural liquid found underground. It is critical for transport, heating, and industry.
What is petroleum?
- This liquid is a mixture of hydrocarbons.
- Hydrocarbons are compounds made of hydrogen and carbon atoms only.
- Petroleum forms from the remains of ancient sea plants and animals.
- Petroleum is used as a source of different fuels.
Composition of petroleum
- Petroleum contains many hydrocarbons of different sizes and shapes.
- These hydrocarbons can be alkanes, cycloalkanes, or aromatic compounds.
- The hydrocarbons are identified by their formulas and structure.
- This mixture makes petroleum useful for various fuel types.
- Hydrocarbons are separated by a process called fractional distillation.
Fractional distillation of petroleum
- This process heats petroleum to vapourise it.
- Vapours rise through a column and cool at different heights.
- Hydrocarbons with different boiling points collect separately.
- This separation produces fuels like petrol, diesel, and kerosene.
Importance of petroleum hydrocarbons
- Petroleum hydrocarbons power vehicles and machines.
- Fuels release energy when hydrocarbons burn with oxygen.
- Petroleum is vital for modern daily life.
Test yourself on Petroleum - A Mixture of Hydrocarbons
From what does petroleum primarily form?