Cracking

Question 1

What is cracking?

Why is it useful?

Answer 1

is splitting up longer-chain hydrocarbons into smaller ones bc they are more useful

Question 2

Name the 3 things involved in cracking oil

Answer 2

heat,moderate pressures,catalyst

Question 3

State 4 steps in cracking liquid paraffin

Answer 3

porous pot heated strongly
liquid paraffin heated and evaporates
paraffin vapour passes over hot porous pot and the hydrocarbon molecules break down
product is ethene gas

Question 4

Explain why cracking is necessary

Answer 4

Some fractions in crude oil arent in as much demand as petrol/diesel .
This means that fuel such as fuel oil /bitumen can be cracked to make petrol/diesel bc it is not in much demand

Question 5

briefly explain what cracking involves

Answer 5

vaporised hydrocarbons passed over powered catalyst
Aluminium oxide (catalyst)
the long chain molecules split or crack on the surface of catalyst.