Memory Anchor:

• Super Challenge:

  Stretch:

  Challenge:

Key Questions:

1. What are the products of the complete combustion?
   • The complete combustion of a hydrocarbon produces carbon dioxide and water.
2. What is the balanced symbol equation for the complete combustion of methane (CH4)? (include state symbols in your answer)
   • CH4(g) + O2(g) -> CO2(g) + H2O(g)
3. What happens to the carbon and hydrogen atoms during combustion reactions?
   • During combustion, the carbon and hydrogen in the fuels are oxidised.
4. What is the useful outcome of the combustion of hydrocarbon fuels?
   • The useful outcome of the combustion of hydrocarbon fuels is that it releases Energy.
5. Describe how the each of the following properties changes as the length of hydrocarbon chains within a fraction increases: a) Boiling point b) Flammability c) Viscosity
   • a) Boiling point increases as chain length increases. b) Flammability decreases as chain length increases. c) Viscosity increases as chain length increases.