The bond dissociation energy is the energy required to break a chemical bond. In this case, we are given the energy required to dissociate the H-H bond in an H2 molecule, which is 432 kJ/mol. Therefore, the bond dissociation energy of the H-H bond in an H2 molecule is 432 kJ/mol. The bond length information is not needed to answer this question since the bond dissociation energy is already provided.