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Name the two products formed when a hydrocarbon burns in a plentiful supply of oxygen
(complete combustion)
Carbon dioxide and water
Name the poisonous gas produced when a hydrocarbon burns in a limited supply of oxygen (incomplete combustion).
Carbon monoxide
What is produced when nitrogen and oxygen from the air react inside a petrol engine?
Oxides of nitrogen which are poisonous
Why is it dangerous to burn fuels containing sulphur compounds?
Sulphur dioxide is produced
(a poisonous gas)
What does a catalytic converter do?
Converts pollutant gases into
harmless gases.Carbon monoxide into carbon dioxide
Oxides of nitrogen into nitrogen
What property allows the hydrocarbons to be separated by fractional distillation?
They have different boiling points
Which size of hydrocarbon molecules have the largest boiling point?
largest molecules - as the molecules become
larger the boiling point increases.
Describe what happens to ease of evaporation, viscosity and flammability as the molecular size increases.
As the molecular size increases
- ease of evaporation decreases
- more viscous(thicker)
- less flammable