Fuels - Hydrocarbons + Combustion of fuels

Question 1

State some Hydrocarbons and their fuel use

Answer 1

• Methane - Natural Gas (LNG)
• Ethane - Natural Gas (LNG)
• Propane - LPG
• Butane - LPG & Cigarette lighters
• Octane - Petrol

Question 2

What are the two types of Combustion Reactions?

Answer 2

• Complete combustion reactions
• Incomplete combustion reactions

Question 3

Combustion reactions produce what type of energy in what form?

Answer 3

Produce heat energy.
Combustion reactions are exothermic reactions.

Question 4

What are the products of complete combustion reaction?

Answer 4

Carbon dioxide + Water

Question 5

What are the products for incomplete combustion reaction?

Answer 5

• Carbon Monoxide + Water
• Carbon + Water
• Carbon Dioxide + Carbon Monoxide + Water
• Carbon Dioxide + Carbon Monoxide + Carbon + Water
• Carbon Monoxide + Cabon + Water

Need to know how to write balanced reactions for bolded equations

Question 6

When is a situation where water is not formed as product for combustion reaction?

Answer 6

When burning Coal (Pure carbon)

Question 7

Describe the 3 steps to balancing a combustion reaction

Answer 7

1. Step 1: Write reactants and products
2. Balance Carbon -> Hydrogen -> Oxygen (CHO)
3. Add states

Question 8

Describe the states used for a combustion reaction for VCAA

Answer 8

• Fuel is always either (g) or (l) - if in organism then (aq)
• Pure carbon product (soot) is always (s)
• Oxygen and Carbon dioxide are (g)
• Water is always (l) at SLC - otherwise (g)