6.15 Separating mixtures – fractional distillation

A process that separates mixtures of miscible liquids with a difference in boiling points of less than 25 ° C.

• Fractional distillation

• Simple distillation

• Fractional condensation

............................................. is a substance that exists in a gaseous state at room temperature.

• Gas

• Vapour

............................................. is a substance that is produced when a liquid or solid turn into gas due to heat (it exists in a solid or liquid state at room temperature).

• Gas

• Vapour

Hydrocarbons are compounds made up of atoms of ...............................................................

• hydroxide and carbon only.

• hydrogen and carbon only.

• hydrogen and carbon dioxide only.

A mixture of hundreds of hydrocarbons.

• Petrol

• Diesel

• Crude oil

A mixture of hydrocarbons made up of atoms between 14 and 19 carbon atoms, used as a fuel in lorries, buses, and some cars.

• Petrol

• Diesel

• Crude oil

A mixture of hydrocarbons made up of atoms between 5 and 10 carbon atoms, sometimes called gasoline or gas.

• Petrol

• Diesel

• Crude oil

Crude oil is heated to more than .................., all the compounds become gases.

• 540 ºC

• 1450 ºC

• 450 ºC

In industrial fractionating columns, compounds that have high boiling points condense near the ...............................

• bottom

• top

The compounds that make up diesel have low boiling

• True

• False