Hess's law gave the net change in enthalpy. According to the law, the enthalpy of the reaction is the addition of the enthalpies of the intermediate reaction. Thus, option B is accurate.
What is Hess's law?
Hess's law or the law of constant heat summation is the measure of the heat or the enthalpy of the chemical reaction. It was given by the chemist, Germain Hess.
The law states that the enthalpy of the chemical reaction is the sum of the enthalpies involved in the reactants and the products of the reaction. It is independent of the steps involved in the reaction.
Therefore, option B. enthalpy of reaction is the summation of the enthalpy of the intermediates.
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