Standard Enthalpy of Formation and Reaction
Standard States and Standard Enthalpy Changes
Standard state and standard enthalpy change describe a reference point and change that a system undergoes under standard conditions.
Calculating the Standard Enthalpy Change Directly
Heat released is equal to the standard enthalpy change when reactants and products are the same temperature and constant pressure.
Hess' law can be used to determine the overall energy required for a chemical reaction.
Heat of Solution and Dilution
Heat of solution is the energy released or absorbed during dissolution of a substance in a solvent.