cracking

Question 1

what is cracking?

Answer 1

cracking is the process of splitting long-chain hydrocarbons into smaller, more useful ones.

Question 2

why is cracking important?

Answer 2

Short-chain hydrocarbons are in higher demand because they are more useful as fuels. Cracking also produces alkenes, which are used to make polymers and other compounds.

Question 3

what does cracking produce?

Answer 3

Cracking produces smaller alkanes (used as fuels) and alkenes (used to make polymers and other compounds).

Question 4

how can bromine water test for allende?

Answer 4

• Bromine water remains orange when added to an alkane (no reaction).
• Bromine water turns colorless when added to an alkene (reaction occurs).

Question 5

what type of reaction is cracking?

Answer 5

Cracking is a thermal decomposition reaction, meaning molecules are broken down by heat.

Question 6

what are the two types of cracking?

Answer 6

• steam cracking
• catalytic cracking

Question 7

how does steam cracking work?

Answer 7

• Long-chain hydrocarbons are heated until they turn into gas.
• The gas is mixed with steam.
• The mixture is heated to a very high temperature, causing the molecules to split.

Question 8

how does catalytic cracking work?

Answer 8

• Long-chain hydrocarbons are heated until they turn into gas.
• The gas is passed over a hot powdered aluminium oxide catalyst.
• The molecules split apart on the surface of the catalyst.