The sulfuric acid is used as a catalyst in the given reaction. Sucrose is break down into individual atoms carbon, hydrogen and oxygen.
Oxygen and hydrogen are combine to form water. The heat is released during the reaction and it is exothermic reaction. we can say that heat is given off because it is exothermic while in endothermic heat is taking by the substance.
Exothermic reaction:
The type of reactions in which energy is released are called exothermic reactions.
In this type of reaction energy needed to break the bonds are less than the energy released during the bond formation.
