Question

what is bond dissociation energy?

Answer 1

The energy required to break a bond.

Answer 2

The energy required to break one mole a particular type of bond

Answer 3

In chemistry, bond-dissociation energy (BDE) or D0, is one measure of the bond strength in a chemical bond. It is defined as the standard enthalpy change when a bond is cleaved by homolysis,[1] with reactants and products of the homolysis reaction at 0 K (absolute zero).

Answer 4

essentially it is the energy required to break a bond. but genrally measurements canot be made for a single molecule and hence a mole of the substance is taken and the energy for breaking a particular type of bond is calculated.hence the units kjoule/mole

Answer 5

When bonds are formed energy is released. Electrons are in a more stable arrangement
when in a bond (molecular orbital) than when they are unpaired (non-bonded) in
atomic orbitals.
H2(g) ---> 2H (g,atom) ∆H° = 436.0 kJ/mol This is a bond-dissociation enthalpy or, bond enthalpy, or just bond energy.
We would write it asD(H–H) = 436.0 kJ/mol