C6.2.6 Flashcards
1
Q
Cracking:
A
Chemical reaction that converts large alkane molecules into smaller alkane molecules and alkene molecules
2
Q
Cracking of octane:
A
Octane → Hexane + Ethene
C8H18 → C6H14 + C2H4
3
Q
What does cracking involve?
A
Cracking involves heating oil fractions to high temperatures and passing them over a hot catalyst
4
Q
What catalysts are used in cracking?
A
Alumina or Silica
5
Q
What happens to covalent bonds under cracking conditions?
A
Covalent bonds between atoms in the large molecule break
6
Q
What temperature does cracking usually happen at?
A
600 oC- 700 oC
7
Q
What scale in cracking carried out on?
A
On a huge scale in refineries
Can be done on a small scale in the lab using pieces of broken pot as a catalyst
