Measure the heat flow at constant pressure (ΔH).Measure the heat flow at constant volume (ΔE).Heat Capacity (C): The amount of heat necessary to raise the temperature of an object or substance a given amountSpecific Heat (Capacity): The amount of heat required to raise the temperature of 1 g of a substance by 1 °CMolar Heat Capacity (Cm): The amount of heat necessary to raise the temperature of 1 mol of a substance by 1 °CHess’s Law: The overall enthalpy change for a reaction is equal to the sum of the enthalpy changes for the individual steps in the reaction.Haber Process