Properties and uses of hydrocarbons

Question 1

What are alkanes

Answer 1

The types of hydrocarbons in crude oil

Question 2

What are alkanes made up of

Answer 2

Carbon and Hydrogen atoms

Question 3

What are the first 4 Alkanes

Answer 3

Methane
Ethane
Propane
Butane

Question 4

What is the formula for Methane

Answer 4

CH

4

Question 5

What is the formula for Ethane

Answer 5

C H

2 6

Question 6

What is the formula for Propane

Answer 6

C H

3 8

Question 7

What is the formula for Butane

Answer 7

C H

4 10

Question 8

What does the diagram for Methane look like

Answer 8

H

H C H

     H

Question 9

What does the diagram for Ethane look like

Answer 9

H H

H C C H

     H      H

Question 10

What does the diagram for Propane look like

Answer 10

H H H

H C C C H

     H      H      H

Question 11

What does the diagram for Butane look like

Answer 11

H H H H

H C C C C H

     H      H      H     H

Question 12

What are the three trends involving; “The sorter the molecule”…

Answer 12

…the more flammable
…the less viscous and more runny
…the more volatile/ the lower the boiling point

Question 13

What are the 2 main features of the petrol fraction

Answer 13

Longer molecules

Higher boiling points

Question 14

What are the 2 main features of the refinery gas fraction

Answer 14

More volatile/Lower boiling points

Shortest molecules

Question 15

What are the uses of Viscous hydrocarbons

Answer 15

Lubricating engine parts

Covering roads

Question 16

What is the use for volatile gases

Answer 16

Bottled Gas - stored under pressure as liquid in bottles where when the tap is opened the fuel vaporises and flows to the burner - ignited

Question 17

What is the use for hydrocarbons from the petrol fraction

Answer 17

Fuel for a car - stored in the tanks where it flows to the engine an vaporises then flows to the burner - ignited