U3S2 alkanes as fuels Flashcards
1
Q
Complete combustion of alkanes
A
- produce carbon dioxide and water
2
Q
Incomplete combustion of alkanes
A
- produces particulate carbon, carbon monoxide, carbon dioxide and water
3
Q
Dangers of incomplete combustion
A
- carbon monoxide stops oxygen being carried around body
- soot causes breathing problems
4
Q
How are nitrogen oxides produced
A
- NO is produced when high pressure and temperature in a car engine cause N and O atoms from air to react
- NO can further react to produce NO2
5
Q
Equations of formation of nitrogen oxides
A
- N2 + O2 -> 2NO
- 2NO + O2 -> 2NO2
6
Q
How is ground level ozone formed
A
- some fuel molecules come out as unburnt hydrocarbons
- hydrocarbons react with nitrogen oxides in the presence of sunlight
7
Q
Dangers of ground level ozone
A
- component of smog
- lung damage
- eye irritation
8
Q
Reaction of a catalytic converter
A
- C3H8 + 5O2 -> 3CO2 + 4H2O
- 2NO -> N2 + O2
- 2NO + 2CO -> N2 + 2CO2
