Standard enthalpy change. Hess’s law

At the end of this activity, students should be able to:
– define standard conditions, standard state and standard enthalpy change
– define and use in calculations standard enthalpies of combustion and standard enthalpies of formation
– explain Hess's law and use it in determining enthalpy changes
– use standard enthalpies of combustion and standard enthalpies of formation in determining the standard enthalpy change of a reaction.