Using Carbon Fuels

Question 1

What should be considered when choosing a fuel

Answer 1

Energy value 
Availability 
Storage
Cost
Toxicity 
Pollution
Ease of use

Question 2

What are fuels

Answer 2

Substances that react with oxygen in the air

Question 3

What does complete combustion need

What colour is the flame and what is formed

Answer 3

Plenty of air

The flame is blue and carbon dioxide and water are formed

Question 4

Why would incomplete combustion occur

What is the colour of the flame and what is formed

Answer 4

Lack of oxygen

The flame is yellow
Carbon monoxide and water are formed

If there is a severe lack of oxygen
Carbon and water are formed

Question 5

What is produced when a hydrocarbon (methane) is burned with complete combustion

Equation

Answer 5

Methane+ oxygen > Carbon dioxide + water

CH4 + 2O2 > CO2 + 2H2O

Question 6

What is produced when a hydrocarbon (methane) is burned with incomplete combustion

Equation

Answer 6

Methane+oxygen> carbon monoxide+ water

2CH4 + 3O2 > 2CO + 4H2O

Question 7

What happens if there is very little oxygen available in incomplete combustion

Answer 7

Methane+oxygen>carbon + water

CH4+O2 > C + 2H2O

Question 8

Which colour flame transfers more energy, blue or yellow flame

Answer 8

Blue, it is complete combustion