How is Hess's law used to calculate the enthalpy of a reaction? O A. The desired enthalpy is obtained through adding intermediate
reactions together.
B. Enthalpies from similar equations are substituted for unknown
reaction enthalpies.
C. The enthalpy is obtained from the difference in final and initial
reactions in a path.
D. The final equation in a reaction path provides the enthalpy for the
desired reaction.