Q.7 Name the unit in which the calorific value of a fuel is expressed.

Calorific value is defined as the energy contained in the fuel.
It is expressed in the form kJ/kg.

where,
kJ = kilo joules
kg = kilogram

The amount of heat energy produced on completely burning one kilogram of fuel is called the calorific value of a fuel. The more is the calorific value of a fuel, more is the efficiency of the fuel.