Question

How does bond dissociation energy relate to bond strength?

Answer 1

To answer this question we should know what bond dissociation energy and what bond strength are. Bond dissociation energy as the name indicates is the energy required to dissociate a bond. Bond strength tells how strong a bond is.

Complete answer:
Two atoms combine to form a molecule. Two atoms join by the formation of a bond. We have to give the energy to break a bond which is known as bond dissociation energy.
The strength of the bond is known as bond strength. A strong bond means both atoms are bonded strongly with each other, so the molecule is very stable. We have supplied a high amount of energy to break this molecule. So, the dissociation energy of the bond will be high.
Similarly, if a bond is not so strong which means it is weak then we have to supply a low amount of energy to break that bond, so the dissociation energy of that bond will be less.
Therefore, the bond dissociation energy is directly related to bond strength. A strong bond requires high bond dissociation energy. A weak bond requires low bond dissociation energy.

Note: Bond strength is directly proportional to the bond dissociation energy. Bond strength is also directly proportional to the bond stability. A stable bond means bond strength is high, so dissociation energy will also be high. Triple bonds require more energy to break than double or single bonds. A double bond requires more energy to break than a single bond.