1.

Explain the help of example, the difference between bond dissociation energy and bond energy.

Answer»

Bond disoociation energy is energy required to break 1 mole of bonds e.g. 

H - H(g) → 2H(g) ΔH = 436 kJ mol-1 

Bond energy is energy released when 1 mole of bonds are formed example 

2H →H2(g) ΔH = -436 kJ mol-1 

In diatomic molecule both bond dissociation energy and bond energy are equal in magnitude but opposite in sign.



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