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Q: Why is expected bond energy the *geometric* mean of two pure bonds?

LysanderothSuppose we are calculating the electronegativity of a bond A—B. In my textbook (Chemical Principles) calculation of electronegativity, they calculate electronegativity in terms of a variable difference in bond energies $\Delta$, which they define as $$\ce{\Delta = (A-B)_{actual} - (A-B)_{expected...

 

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