Use the molar bond enthalpy data in the table to estimate the value of Δ?∘rxnΔHrxn° for the equation   C2H4(g)+HBr(g)⟶C2H5Br(g)   The bonding in the molecules is shown.

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Chapter1: Chemical Foundations
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Use the molar bond enthalpy data in the table to estimate the value of Δ?∘rxnΔHrxn° for the equation

 

C2H4(g)+HBr(g)⟶C2H5Br(g)

 

The bonding in the molecules is shown.

 

Average molar bond enthalpies. (?bond)(Hbond)
Bond ??⋅???−1kJ⋅mol−1 Bond ??⋅???−1kJ⋅mol−1
O−H 464 C≡N 890
O−O 142 N−H 390
C−O 351 N−N 159
O=O 502 N=N 418
C=O 730 N≡N 945
C−C 347 F−F 155
C=C 615 Cl−Cl 243
C≡C 811 Br−Br 192
C−H 414 H−H 435
C−F 439 H−F 565
C−Cl 331 H−Cl 431
C−Br 276276 H−Br 368
C−N 293293 H−S 364
C=N 615615 S−S 225
Δ?∘rxn=   kJ
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