At a particular temperature and 1 atm pressure, 1 gm-mole of substance completely burn with O2. From this reaction heat is evolve that heat is known as heat of combustion of that substance.
Importance of combustion heat:
- We can determine reaction enthalpy and formation enthalpy by using heat of combustion.
- To deter mine the formation of compound
- To determine the calorie of food and fuel.