Bond Enthalpies

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Soumya Ravichandran 4H
Posts: 62
Joined: Fri Sep 28, 2018 12:19 am

Bond Enthalpies

Postby Soumya Ravichandran 4H » Thu Jan 31, 2019 11:39 am

Are both bond enthalpies and standard enthalpies of formation given by mol, meaning that we always have to multiply by the stoichometric coefficients? Also, for which method is do we say that the enthalpy of a pure substance is zero?

Elisa Bass 4L
Posts: 61
Joined: Fri Sep 28, 2018 12:23 am

Re: Bond Enthalpies

Postby Elisa Bass 4L » Thu Jan 31, 2019 12:04 pm

Yes, they are both given in terms of mol, so you have to multiply by the stoichiometric coefficients if you want to find the enthalpy of the reaction based off of bond enthalpies or standard enthalpies of formation.

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Re: Bond Enthalpies

Postby Nandhini_2K » Thu Jan 31, 2019 12:59 pm

When we're solving for Enthalpy using standard enthalpy of formation method pure substances are zero.

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