Question

Define burning of a fuel

Answer 1

Burning fuels. We burn fuels such as coal to produce energy. ... Petrol, diesel fuel and fuel oil are hydrocarbons. Their molecules are made of carbon and hydrogen atoms. When these fuels burn, the carbon and hydrogen atoms combine with oxygen atoms to produce carbon dioxide and water vapour

Answer 2

1.Heat of combustion is total amount of heat released when a fuel is burnt when there is complete combustion with oxygen. 
2.The heat of combustion can be expressed as follows: energy/mole of fuel, energy/volume of the fuel.
3.The amount of heat produced by a fuel is measured by calorimeter.