Alkenes

Question 1

What is cracking?

Answer 1

The breaking down of longer chained hydrocarbons into shorter more useful hydrocarbons

Question 2

What are the products of Cracking?

Answer 2

Short chained hydrocarbons + alkane + alkenes

Question 3

Describe the process of cracking:
Catalytic cracking

Answer 3

1) The long chain hydrocarbons are heated until they are vaporised
2) The vapour is then passed over a hot catalyst
3) Thermal decomposition then takes place
4) This cause the break down of the longer carbon chains into shorter carbon chains- The products can be alkanes or alkenes

Question 4

Describe the process of cracking:
Steam cracking

Answer 4

1) Hydrocarbons are mixed with steam and are heated to a high temperature
2) This causes thermal decomposition and breaks the long hydrocarbon chains into shorter hydrocarbon chains

Question 5

What is there a higher demand for fuels with shorter carbon chains?

Answer 5

.As they ignite easier and have lower boiling points

Question 6

What can Alkenes be used to make?

Answer 6

Polymers
New compounds
Industrial alcachol

Question 7

Are alkanes saturated or unsaturated?

Answer 7

Unsaturated

Question 8

Alkane have what kind of bonds?

Answer 8

They have double c-c bonds

Question 9

what is the general formula for alkanes?

Answer 9

Cn H2n