JEE Mains Model Paper 19

Question : 65 of 90

Marks: +1, -0

The standard enthalpy of formation of NH3 is −46.0 kJ mol−1. If the enthalpy of formation of H2 fromits atoms is −436 kJ mol−1 and that of −712 kJ mol−1 , the average bond enthalpy of N − H bond inNH3 is