Properties and Uses of Crude Oil

Question 1

What are all the fractions of crude oil? What are they called?

Answer 1

All the fractions of crude oil are hydrocarbons called alkanes.

Question 2

What are alkanes made up of?

Answer 2

Alkanes are made up of chains of carbon atoms surrounded by hydrogen atoms.

Question 3

What do different alkanes have?

Answer 3

Chains of different lengths.

Question 4

What are the first four alkanes?

Answer 4

1. Methane (CH2)
2. Ethane (C2H6)
3. Propane (C3H8)
4. Butane (C4H10)

Question 5

How many bonds does carbon atoms form?

How many bonds does hydrogen form?

Answer 5

Carbon- 4

Hydrogen- 1

Question 6

Atoms have formed bonds with as many other atoms as they can. What does this tell you about them?

Answer 6

They are saturated.

Question 7

General formula for alkanes.

Answer 7

CnH2n+2

So if an alkane has 5 carbons, it’s got to have

(2x5)+2 = 12 hydrogens.