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COMBUSTION Describe the process of combustion

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Presentation on theme: "COMBUSTION Describe the process of combustion"— Presentation transcript:

1 COMBUSTION Describe the process of combustion
Write word and symbol equations for combustion reactions.

2 Starter Suggest one use for each fuel: Natural gas Petrol Diesel
Kerosene Heating oil

3 To describe the process of combustion.
If you light a candle and put jar over it, what do you predict will happen? Can you explain this? Fuel ( e.g hydrocarbon) and oxygen. Oxidation reaction So, what are needed? What type of reaction is this? Why do we burn things?

4 To describe the process of combustion.
Crude oil can be separated by fractional distillation. The oil is evaporated and the hydrocarbon chains of different lengths condense at different temperatures: Fractions with low boiling points condense at the top Fractions with high boiling points condense at the bottom

5 What happens when fossil fuels burn?
The apparatus below is used to test what is made when the hydrocarbon wax burns… Suction pump ice- water Candle wax is the hydrocarbon here Lime water Liquid collected can be tested with anhydrous cobalt chloride paper (bluepink). any hydrocarbon + oxygen  water + carbon dioxide

6 To describe the process of combustion.
Complete combustion- With enough oxygen Incomplete combustion- without enough oxygen

7 Methane Oxygen Carbon Dioxide Water Methane Oxygen Carbon Monoxide Water

8 CH4 O CO2 H2O CH O2 3 CO H2O

9 To write word and symbol equations for combustion reactions.
Methane + Oxygen  Carbon Dioxide + Water CH4 + 2O2 -> CO2 + 2H2O Methane + Oxygen -> Carbon Monoxide + Water 2CH4 + 3O2 -> 2CO + 4H2O Now work through the questions on page 223 of your SciPad

10 To know possible fuels that can be used in the home.

11 In the back of your books, see how many questions you can answer without looking at your notes
Success criteria- Describe the process of combustion Write word and symbol equations for combustion reactions. State 3 fuels we use daily. What happens when fuels burn? What is complete combustion? Word equation- Symbol equation- What is incomplete combustion? What is a problem with burning fossil fuels?


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