C1b - Using Carbon Fuels for OCR Gateway B

New GCSE Chemistry for GCSE Science from 2011. 

higher tier. 

C1 - 

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  • Created by: Hapsa
  • Created on: 05-02-13 18:44
Preview of C1b - Using Carbon Fuels for OCR Gateway B

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Carbon Chemistry
C1b) Using Carbon Fuels (I need to list the factors)
Incomplete combustion ­ 2 word equations
Fuel + oxygen carbon monoxide + water
Fuel + oxygen carbon + water
This happens when there is not enough oxygen
CH4 + 2O2 CO2 + 2H2O Complete combustion
2CH4 + 3O2 2CO + 4H2O or CH4 + O2 C + 2H2O
Steam represents water
Cobalt chloride paper is used to test for water/vapour ­ blue to pink
Water turns milky when carbon dioxide is present
Bunsen burner flame
o Air hole open = flame burns plenty of oxygen = blue flame = combustion completes =
more energy released (advantage)
o Air hole closed = shortage of oxygen = yellow flame = combustion incomplete = less
energy released
Carbon monoxide, soot, water vapour and carbon dioxide are produced.
Complete combustion is better than incomplete combustion because less soot is produced,
carbon monoxide toxic substance is not released and more heat is released.
Pollution problems, greenhouse effect, global warming, sulphur rocks

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