Which of the following is a statement of hess's law? if a reaction is carried out in a series of steps, the δh for the reaction will equal the sum of the enthalpy changes for the individual steps. the δh of a reaction depends on the physical states of the reactants and products. the δh for a process in the forward direction is equal in magnitude and opposite in sign to the δh for the process in the reverse direction. the δh for a process in the forward direction is equal to the δh for the process in the reverse direction. if a reaction is carried out in a series of steps, the δh for the reaction will equal the product of the enthalpy changes for the individual steps.