Bond enthalpy

Dina 2k
Posts: 57
Joined: Wed Sep 18, 2019 12:17 am

Bond enthalpy

how do we use bond enthalpies to calculate ΔH? and was that the least inaccurate method?

Kate Osborne 1H
Posts: 102
Joined: Fri Aug 30, 2019 12:16 am

Re: Bond enthalpy

using bond enthalpies to calculate delta h is the least accurate method, but to do so you would be given the bond enthalpies of the products/reactants and you would plug them into the equation we are given

Luc Zelissen 1K
Posts: 57
Joined: Mon Jun 17, 2019 7:23 am

Re: Bond enthalpy

$\Sigma \Delta H_(Bonds broken) - \Sigma \Delta H(Bondsformed)$. You add up the bond enthalpies from the product side and subtract it from the sum of the bond enthalpies of the reactant side. Also remember to take into account the stoichometric values in your math.
You are right that it is the least accurate method.

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