U2-1-2 - Fractional Distillation

Question 1

Crude oil is a mixture of mainly …

Answer 1

hydrocarbons.

Question 2

Hydrocarbon

Answer 2

A compound which contains only hydrogen and carbon.

Question 3

Oil fraction

Answer 3

A group of compounds with similar boiling points (found in crude oil).

Question 4

The process used to separate crude oil into fractions based on their boiling point.

Answer 4

Fractional distillation

Question 5

Fractional distillation

Answer 5

The process used to separate crude oil into fractions based on their boiling point.

Question 6

Fractional distillation:

There is a ……… inside a fractionating column (hot at the bottom, cold at the top). Gases go up the tower, condense into liquids at different temperatures and can be piped off.

Answer 6

Fractional distillation:

There is a temperature gradient inside a fractionating column (hot at the bottom, cold at the top). Gases go up the tower, condense into liquids at different temperatures and can be piped off.

Question 7

Fractional distillation:

There is a temperature gradient inside a fractionating column (hot at the bottom, cold at the top). Gases go up the tower, ………… into liquids at different temperatures and can be piped off.

Answer 7

Fractional distillation:

There is a temperature gradient inside a fractionating column (hot at the bottom, cold at the top). Gases go up the tower, condense into liquids at different temperatures and can be piped off.

Question 8

Fractional distillation:

There is a temperature gradient inside a fractionating column (hot at the bottom, cold at the top). Gases go up the tower, condense into liquids at different ………. and can be piped off.

Answer 8

Fractional distillation:

There is a temperature gradient inside a fractionating column (hot at the bottom, cold at the top). Gases go up the tower, condense into liquids at different temperatures and can be piped off.

Question 9

There are weak forces between molecules which hold them together. The larger the molecules, the ….. the forces.

Answer 9

There are weak forces between molecules which hold them together. The larger the molecules, the stronger the forces.

Question 10

Viscous

Answer 10

Thick liquid (e.g. golden syrup)

Question 11

Volatile

Answer 11

Evaporates easily

(evaporates = turns into a gas)