Question

Explain bond enthalpy??????????

Answer 1

Bond enthalpy (also known as bond energy) is defined as the amount of energy required to break one mole of the stated bond. For example, the bond energy of a O-H single bond is 463 kJ/mol. This means that it requires 463 kJ of energy to break one mole of O-H bonds. 
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Answer 2

Bond enthalpy is the amount of energy released when one mole of bends are formed from the isolated atoms in the gaseous state or amount of energy required to break one mole of bends present between the atoms in the gaseous molecule