7.1.3 Properties of hydrocarbons

Question 1

What do the properties of hydrocarbons depend on?
What are these properties?

Answer 1

size of the molecules
- as the molecular size increases, the hydrocarbons have higher boiling points, become more viscous and become less flammable

Question 2

What does combustion of hydrocarbon fuels release?
What happens during combustion?
Products
Full equation

Question 3

How can you test for water?

Answer 3

use blue cobalt chloride paper
- blue -> pink in contact with water

Question 4

Incomplete combustion

Answer 4

• fuels not burned completely
• limited supply of air
• may produce toxic gas - eg. carbon monoxide