Bond Energy Definition Formula and Examples in Chemistry

“The amount of energy required to break a bond between two atoms in a diatomic molecule is known as bond energy”. The higher this energy, the more stable the bond. it is affected by the strength of the bond, the length of the bond, and the surrounding environment.

SI Unit of Bond Energy

it is expressed in kilojoules per mole (KJ/mol) unit.

Factors Affecting Bond Energy

Bond energy depends on the following factors:

  • Polarity of Bond
  • Bond Distance

Polarity of Bond

it is the measure of the strength of bonds. Since polar covalent bonds are a stronger bonds than non-polar covalent bonds due to the presence of ionic character. Therefore, the bond energies of polar covalent bonds are greater than the pure covalent bonds (non-polar bonds).bond energy

Bond Distance

The value of bond energy also depends upon the bond distance. The shorter the bond distance, the stronger the bond and the greater would be the energy.

For example, triple bonds are usually shorter than double bonds which in turn are shorter than single bonds. Hence, the energies for the multiple bonds would generally be greater than those of single bonds.

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