1.

Give the bond energies of N equiv N, H-H and N-H bonds as 945, 436 and 391 kJmol^-1 respectively, the enthalpy of the following reaction N2(g)​ +3H2(g)​ →2NH3(g)​is:

Answer»

`-93 KJ`
102 kJ
90 kJ
105 kJ

Answer :A


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