Answer:
A) enthalpy of reaction
Explanation:
The region C signifies the enthalpy of reaction.
This diagram is the energy profile of an endothermic reaction. In such reaction, heat is absorbed from the surrounding. At the end of the reaction, the heat of product is lesser than that of the reactants.
- Enthalpy changes are heat changes accompanying a physical and chemical change.
- An enthalpy is the difference between the sum of the heat contents of products and sum of the heat contents of reactants.
