Pauling s reasoning in establishing his original

Chapter 10, Problem 128

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Pauling s reasoning in establishing his original electronegativity scale went something like this: If we assume that the bond is nonpolar, its bond energy is the average of the bond energies of and The difference between the calculated and measured bond energies of the bond is attributable to the partial ionic character of the bond and is called the ionic resonance energy (IRE). If the IRE is expressed in kilojoules per mole, the relationship between IRE and the electronegativity difference is To test this basis for an electronegativity scale, (a) Use data from Table 10.3 to determine IRE for the bond. (b) Determine EN for the HCl bond. HCl 1EN22 = IRE>96. AB BB. AA AB (c) Establish the approximate percent ionic character in the bond by using the result of part (b) and Figure 10-7. Compare this result with that obtained in Example 10-4.