The standard enthalphy of formation of NH3 is 46 0 kJ mol 1 If the enthalpy of formation of H from its atoms is 436 kJ mol 1 and

Question

The standard enthalphy of formation of NH3 is 46 0 kJ mol 1 If the enthalpy of formation of H from its atoms is 436 kJ mol 1 and that of N is 712kJ mol 1 the average bond enthalpy of N H bond in NH3 is 1 1102 kJ mol 1 2 964 kJ mol 1 3 352 kJ mol 1 4 1056 kJ mol 1

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