Coal has a higher calorific value as compared to wood. Hence, the given statement is ‘False’. It is a measure of the heating ability of a coal and is needed to estimate the amount of coal needed to produce a desired amount of heat. Calorific values are also used to define coal rank in low- and medium-rank coals below the rank of medium-volatile bituminous in the U.S. classification system.
Calorific value can be measured in standard English units (Btu/lb) or in metric units (kilojoules/kg or megajoules/kg). One Btu is equivalent to the amount of work (directional force) needed to raise the temperature of 1 pound of water by 1Â° Fahrenheit.