the minimum energy required to start a reaction by the breakingofbonds
mean bond enthalpy
the energy required to break a covalent bond, averaged for that type of bond in a range of different compounds
standard enthalpy of formation
the enthalpy change that occurs when one mole of a compound is formed from its constituent elements with all reactants and products in their standardstates
standard enthalpy of combustion
the enthalpy change that occurs when one mole of a compound reacts completely in oxygen with all reactants and products in their standard states
hess's law
the enthalpychange for a chemical reaction is indepedent of the route taken
