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Enthalpy of Formation

Posted: Sun Feb 03, 2019 8:10 pm
by 305174946
So when calculating bond enthalpies the final answer will be an enthalpy of formation, correct? So I know that bond enthalpies are always positive, but the formation can be pos or neg based on if the number of reactants/products, right?

Re: Enthalpy of Formation

Posted: Sun Feb 03, 2019 8:20 pm
by Tessa Lawler 1A
Enthalpy of formation can be negative or positive, yes.

Re: Enthalpy of Formation

Posted: Sun Feb 03, 2019 8:50 pm
by chris_tsai_4H
Yes, bond enthalpy can be either positive or negative since the value is based on whether the formation of the bond requires or produces heat.