Bond energy `H-H,F-F and H-F` bonds are 104, 38 and 135 Kcal `"mol"^(- – InterviewSolution

1.	Bond energy `H-H,F-F and H-F` bonds are 104, 38 and 135 Kcal `"mol"^(-1)`, respectively. The resonance energy in the `H-F` molecule will beA. 142 Kcal `"mol"^(-1)`B. 66 kcal `"mol"^(-1)`C. `72.14` kcal `"mol"^(-1)`D. `79.26` kcal `"mol"^(-1)`
Answer» Correct Answer - C Resonance energy, `Delta _(H-F)=(BE)_(H-F)- sqrt((BE)_(H_(2))(BeE)_(F_(2)))` `=135-sqrt(104xx38)` `=135-62.86=72.14 "kcal mo"^(-1)`

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