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Bond energies

The energy of a given bond is the change of enthalpy of the reaction which breaks 1 mole of such bonds. It is a mean value calculated on many similar bonds.

Bond Bond energy
$kJ$
$25^oC$
$1bar$
H-H 436
H-F 565
H-Cl 431
H-Br 364
H-I 297
F-F 155
Cl-Cl 243
O-O 138
O=O 494
O-H 465
O-F 184
O-Cl 205
N-N 159
NΞN 942
N-H 389
N-Cl 202
C-C 347
C=C 620
CΞC 812
C-H 414
C-O 352
C=O 707
C-Cl 327
C-N 293
CΞN 879
S-S 264
S-H 339
S-Cl 276
P-H 318
P-Cl 318