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Bond enthalpy

Posted: Sat Mar 16, 2019 10:28 pm
by Valeria Viera 1B
Which should we use on final:
Sum of bonds broken - sum of bond formed
Or
Sum of bonds in reactant side - sum of bonds in product side

Re: Bond enthalpy

Posted: Sat Mar 16, 2019 10:31 pm
by Samantha Pacheco 2K
You would use
∆Hrxn=∆H(bonds broken)-∆H(bonds formed)

Re: Bond enthalpy

Posted: Sat Mar 16, 2019 10:33 pm
by Chem_Mod
Sum of bonds broken - sum of bonds formed because this is essentially the amount of energy you are putting into the system to break bonds - the amount of energy that is released by the formation of new bonds.