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12.7: Appendix 3- Bond Enthalpies

  • Page ID
    190430
  • Average single bond enthalpies (kJ/mol)

    H-H 436 C-H 413 N-H 391 O-H 483 F-F 155
    H-F 567 C-C 348 N-N 163 O-O 146
    H-Cl 431 C-N 293 N-O 201 O-F 190 Cl-F 253
    H-Br 366 C-O 358 N-F 272 O-Cl 203 Cl-Cl 242
    H-I 299 C-F 485 N-Cl 200 O-I 234
    C-Cl 328 N-Br 243 Br-F 237
    C-Br 276 S-H 339 Br-Cl 218
    C-I 240 P-H 322 S-F 327 Br-Br 193
    C-S 259 P-F 490 S-Cl 253
    S-Br 218 I-Cl 208
    Si-H 323 S-S 266 I-Br 175
    Si-Si 226 I-I 151
    Si-C 301
    Si-O 368
    Si-F 565
    Si-Cl 464

    Average double bond enthalpies (kJ/mol)

    C=C 614 N=N 418 O=O 495
    C=N 615 N=O 607 S=O 523
    C=O 799 S=S 418

    Average triple bond enthalpies (kJ/mol)

    C≡C 839 C≡N 891 N≡N 941 C≡O 1072
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