Solution:
Concept- The amount of heat generated by full combustion of 1g fuel is indicated by the calorific values.Calorific value refers to the amount of heat produced by a unit volume of a substance through complete combustion.The unit of calorific value is kJ/kg or kJ/g.
Features of the optimum fuel:
● Fuel is inexpensive and readily supplied
● Burns easily in the air at a moderate temperature
● Significant amount of energy
● Fuel eco-friendly must not emit any dangerous pollutants.
How good a fuel is based on its calorific value. Thus, higher the calorific value, higher is the efficiency of fuel.
Hence, the amount of heat created when 1 g of fuel is completely burned is known as the fuel's calorific value.
