BOND ENTHALPIES
Bond ΔH (kJ/mole) Bond ΔH (kJ/mole) Bond ΔH (kJ/mole)
–∞–∞–∞–∞–∞–∞–∞–∞–∞–∞–∞–∞–∞–Hydrogen–∞–∞–∞–∞–∞–∞–∞–∞–∞–∞–∞–∞–∞–
H–H 436 H–C 413 H–N 391
H–O 463 H–Si 323 H–S 339
H–F 567 H–Cl 431 H–Br 366
H–I 299
–∞–∞–∞–∞–∞–∞–∞–∞–∞–∞–∞–∞–∞–Carbon–∞–∞–∞–∞–∞–∞–∞–∞–∞–∞–∞–∞–∞–
C–H 413 C–C 348 C–N 293
C–O 358 C–F 485 C–Cl 328
C–Br 276 C–I 240 C–Si 301
C–S 259
C=C 614 C=N 615 C=O 799
C≡C 839 C≡N 891 C≡O 1072
–∞–∞–∞–∞–∞–∞–∞–∞–∞–∞–∞–∞–∞–Nitrogen–∞–∞–∞–∞–∞–∞–∞–∞–∞–∞–∞–∞–∞–
N–H 391 N–C 293 N–N 163
N–O 201 N–C 293 N–F 272
N–Cl 200 N–Br 243
N=C 615 N=N 418 N=O 607
N≡C 891 N≡N 941
–∞–∞–∞–∞–∞–∞–∞–∞–∞–∞–∞–∞–∞–Oxygen–∞–∞–∞–∞–∞–∞–∞–∞–∞–∞–∞–∞–∞–
O–H 463 O–C 358 O–N 201
O–O 146 O–Si 368
O=C 799 O=N 607 O=O 495
O=S 523
O≡C 1072
–∞–∞–∞–∞–∞–∞–∞–∞–∞–∞–∞–∞–∞–Fluorine–∞–∞–∞–∞–∞–∞–∞–∞–∞–∞–∞–∞–∞–
F–H 567 F–C 485 F–N 272
F–F 155
–∞–∞–∞–∞–∞–∞–∞–∞–∞–∞–∞–∞–∞–Silicon–∞–∞–∞–∞–∞–∞–∞–∞–∞–∞–∞–∞–∞–
Si–H 323 Si–C 301 Si–O 368
Si–Si 226 Si–Cl 464
–∞–∞–∞–∞–∞–∞–∞–∞–∞–∞–∞–∞–∞–Sulfur–∞–∞–∞–∞–∞–∞–∞–∞–∞–∞–∞–∞–∞–
S–H 339 S–C 259
S=O 523 S=S 418
–∞–∞–∞–∞–∞–∞–∞–∞–∞–∞–∞–∞–∞–Chlorine–∞–∞–∞–∞–∞–∞–∞–∞–∞–∞–∞–∞–∞–
Cl–H 431 Cl–C 328 Cl–N 200
Cl–Cl 242
–∞–∞–∞–∞–∞–∞–∞–∞–∞–∞–∞–∞–∞–Bromine–∞–∞–∞–∞–∞–∞–∞–∞–∞–∞–∞–∞–∞–
Br–H 366 Br–C 276 Br–N 243
Br–Br 193
–∞–∞–∞–∞–∞–∞–∞–∞–∞–∞–∞–∞–∞–Iodine–∞–∞–∞–∞–∞–∞–∞–∞–∞–∞–∞–∞–∞–
I–H 299 I–C 240 I–I 151