Crude oil

Question 1

Uses of crude oil

-fuel for t…
-in the p… industry as a f… to make new compounds for use in things like p…, solvents, lubricant and d…

Answer 1

-fuel for transport
-in the petrochemical industry as a feedstock to make new compounds for use in things like polymers, solvents, lubricant and detergents

Question 2

Are short or long chain hydrocarbons better for fuel

Answer 2

Shirt chain hydrocarbons

Question 3

How are long chain hydrocarbons turned into smaller ones

Answer 3

Cracking

Question 4

What two types of hydrocarbon does cracking produce

Answer 4

Alkanes and alkenes

Question 5

What is cracking

Answer 5

-a thermal decomposition reaction, where molecules are broken down by heating

Question 6

Methods of cracking

1. Heat …-chain hydrocarbons to v… them
2. The vapour is then p… over a hot p… aluminium oxide c…
3. The long-c… molecules s… apart on the … of the catalyst-> … cracking
   OR
4. You can crack h… if you v… them and then mix them with s… and heat them at high t…
   —>… cracking

Answer 6

1. Heat long-chain hydrocarbons to vaporise them
2. The vapour is then passed over a hot powdered aluminium oxide catalyst
3. The long-chain molecules split apart on the surface of the catalyst->catalytic cracking
   OR
4. You can crack hydrocarbons if you vaporise them and then mix them with steam and heat them at high temperatures
   —>steam cracking

Question 7

What are the types of cracking

Answer 7

Catalytic and steam cracking