4 posts • Page 1 of 1
I remember a question that was like why would there be a difference in the enthalpy calculated from bond enthalpies and the enthalpy of formations. Why is there a difference and which is more accurate? Would the bond enthalpies be more inaccurate because its just an average and can vary a lot due to conditions?
Calculating enthalpies using bond enthalpy is the least accurate method since this method uses the average bond enthalpies. Because of this, bond enthalpies are not specific to certain molecules.
Exactly. Using enthalpies of formation are a lot more accurate because it's the exact energy needed to form one mole of a substance. Bond enthalpies merely use averages of the exact energy needed to break/form a bond.
This is because you are adding the average enthalpies within the bonds. Therefore, when you add up the total enthalpies, it is slightly inaccurate.
Who is online
Users browsing this forum: No registered users and 1 guest