Hess’ Law Learning Goal: I will be able to use Hess’ Law to add enthalpy changes for the individual steps leading to a product in order to determine an.
Hess’s law of heat summation states that for a chemical equation that can be written as the sum of two or more steps, the enthalpy change for the overall.
Enthalpies of Formation. An enthalpy of formation, H f, is defined as the enthalpy change for the reaction in which a compound is made from its constituent.
