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Bond Enthalpies

Posted: Thu Jan 31, 2019 11:39 am
by Soumya Ravichandran 4H
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?

Re: Bond Enthalpies

Posted: Thu Jan 31, 2019 12:04 pm
by Elisa Bass 4L
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.

Re: Bond Enthalpies

Posted: Thu Jan 31, 2019 12:59 pm
by Nandhini_2K
When we're solving for Enthalpy using standard enthalpy of formation method pure substances are zero.