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Problem: Use Table 9.2 to calculate _H0 for the following reaction:
Plan: Write Lewis structures of substances. Assume all reactant bonds are broken and all product bonds are formed; BE’s Table 9.2.
Sum the BE’s and add the two sums (with signs) to give _Hrxn.
Solution:
Calculating _H 0rxn : For bonds broken, the values are
Skill 10-4. Using Lewis structures to calculate DH°rxn from bond energies
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