Alkanes (AS)

Question 1

How do you separate a mixture of hydrocarbons with different lengths

Answer 1

Fractional distillation

Question 2

Describe how fractional distillation happens

Answer 2

• Mixture is vaporised and pumped into the fractionating column
• The vapour rises, cools and condenses
• ## The liquid is collecetdvat different boiling temperatures as fractions.

Question 3

On a fractionating column, where are the short chains and long chains collected from

top / bottom of the column

Answer 3

Short chains, lower boiling points, top of the column

Long chains, higher boiling points, bottom of the column