A sample of coal has the following composition by mass:
Carbon = 75%
Hydrogen = 6%
Oxygen = 8%
Nitrogen = 2.5
Sulfur = 1.5%
Ash = 7%
Determine the higher calorific value per kg of coal.
a. 33,000 kJ/kg
b. 26,000 kJ/kg
c. 29,000 kJ/kg
d. 35,000 kJ/kg