Combustion of alkanes Flashcards
What does the complete combustion of alkanes produce?
Carbon dioxide and water
What does the incomplete combustion if alkanes produce?
Carbon monoxide and water
Combustion reacts give out…
heat
More heat is produced when the carbon chains are longer or shorter?
Longer
What are the two properties of a fuel?
They release heat energy when undergoing combustion
They store a large amount of energy in a small amount of weight
What are the 5 examples of an alkane fuel?
Methane Propane Butane Petrol Parraffin
What is bad about carbon monoxide?
It is a poisonous gas
When combustion takes place with a tiney tiny amount of oxygen, what is produced?
carbon (soot)
Incomplete combustion usually occurs with longer chain hydrocarbons. Why is this?
Because they need more oxygen to burn compared to shorter chains
What are the pollutants that combustion can produce?
Carbon monoxide Carbon dioxide Nitrogen oxide Sulfur dioxide Carbon particles Unburnt hydrocarbons Water vapour
What is bad about nitrogen oxides?
They react with water vapour and oxygen in the air to form nitric acid. Thus they contribute to acid rain and photochemical smog
How is nitric acid formed?
When there is enough energy for nitrogen and oxygen in the air to combine
What is bad about sulfur dioxide?
It combines with water vapour and oxygen in the air to create to form sulfuric acid. Thus it is a contributor to acid rain
How is sulfur dioxide formed?
It is produced when sulfur-containing impurities are present in crude oil
What is another name for carbon particles?
Particulates