25*(7*3)+8+5=538
25*(7*3)+8+5=538
Bond enthalpies: the difference between energy in and energy out, so Reactants - Products.
Enthalpy change of a reaction = Products - Reactants.
Enthalpy change of formation = Products - Reactants
Enthalpy change of combustion = Reactants - products
Bond enthalpies: the difference between energy in and energy out, so Reactants - Products.
Enthalpy change of a reaction = Products - Reactants.
Enthalpy change of formation = Products - Reactants
Enthalpy change of combustion = Reactants - products