Standard Enthalpy Of Reaction

  • Thread starter cnoa
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  • #1
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Main Question or Discussion Point

http://en.wikipedia.org/wiki/Standard_enthalpy_of_reaction" [Broken] of reactants (ΔHfO).

My question is, why?

And I also know that I can find http://en.wikipedia.org/wiki/Standard_enthalpy_of_reaction" [Broken] (ΔHrO) by subtracting the bond energies of the reactants from the products. The result differs very little from the the first method.

Also, why is that?
 
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Answers and Replies

  • #2
My Answer to your First Question: The standard heat of formation of the reaction is like the "net" heat of the reaction which is "(final) minus (initial)", which is what that formula describes.
 

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