Bond Energy
Contents
Key Stage 4
Meaning
Bond Energy is the energy needed to break a chemical bond between two atoms.
About Bond Energy
- When chemical bonds are formed energy is released to the surroundings increasing the temperature. An exothermic process]].
- To break chemical bonds energy is needed to separate the atoms, decreasing the temperature of the surroundings. An endothermic process]].
Examples
Some common bond energies are given in the table below.
| Bond | Energy in kJ/mol |
| H-H | 436 |
| O=O | 498 |
| N≡N | 941 |
| C-C | 347 |
| C=C | 614 |
| C≡C | 839 |
| C-H | 413 |
| O-H | 464 |
| C=O | 799 |
| Cl-Cl | 243 |
| H-Cl | 432 |
| N-H | 391 |