combustion of alkanes

Question 1

short chain Alkanes are combusted (burnt) on a large scale ………….

Answer 1

for their use as fuels as they are flammable and release lots of energy when burned

Question 2

What is complete combustion of a alkane

Answer 2

When alkanes are burnt in excess (plenty of) oxygen, complete combustion will take place and all carbon and hydrogen will be oxidised to carbon dioxide and water respectively

Question 3

Incomplete combustion of a alkane when there is limited oxygen

Answer 3

When alkanes are burnt in only a limited supply of oxygen, incomplete combustion will take place and not all the carbon is fully oxidised

Some carbon is only partially oxidised to form carbon monoxide and water

Question 4

Incomplete combustion often takes place inside a car engine due to a limited amount of oxygen present
With a reduced supply of oxygen what is produced

Answer 4

carbon will be produced in the form of soot

and water

Question 5

Combustion & The Environment
Car exhaust fumes include toxic gases such as

Answer 5

carbon monoxide (CO), oxides of nitrogen (NO/NO2) and volatile organic compounds (VOCs)