combustion describe the process of combustion write word and symbol equations for combustion...
Post on 23-Dec-2015
218 Views
Preview:
TRANSCRIPT
COMBUSTION
• Describe the process of combustion
• Write word and symbol equations for combustion reactions.
• https://www.youtube.com/watch?v=zEjEqnMBdEM
Starter
Suggest one use for each fuel:
• Natural gas• Petrol• Diesel• Kerosene• Heating oil
If you light a candle and put jar over it, what do you predict will happen? Can you explain this?
So, what are needed? What type of reaction is
this?Why do we burn things?
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
To describe the process of combustion.
The apparatus below is used to test what is made when the hydrocarbon wax burns…
any hydrocarbon + oxygen water + carbon dioxide
Suctionpump
Candle wax is thehydrocarbon here
ice-water
Liquid collectedcan be tested withanhydrous cobalt chloridepaper (bluepink).
Lime water
1. Complete combustion- With enough oxygen
2. Incomplete combustion- without enough oxygen
To describe the process of combustion.
Methane
Oxygen
Carbon Dioxide
Water
+ + + +
Methane
Oxygen
Carbon Monoxide
Water
CH4
O2 2
CO2
H2O 2
+ + + +
CH4 2
O2 3
CO 2
H2O 4
• Methane + Oxygen Carbon Dioxide + Water
• CH4 + 2O2 -> CO2 + 2H2O
• Methane + Oxygen -> Carbon Monoxide + Water
• 2CH4 + 3O2 -> 2CO + 4H2O
To write word and symbol equations for combustion reactions.
Now work through the questions on page 223 of your SciPad
To know possible fuels that can be used in the home.
• https://www.youtube.com/watch?v=UygUcMkRy_c
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.
1. State 3 fuels we use daily.2. What happens when fuels burn?
3. What is complete combustion?
4. Word equation-
5. Symbol equation-
6. What is incomplete combustion?
7. Word equation-
8. Symbol equation-
9. What is a problem with burning fossil fuels?
top related