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CGP EDU Academic Team
Published on: August 14, 2026
Bond energies of N ≡ N; H–H and N–H bonds are 945, 463 & 391 kJ mol –1 respectively, the enthalpy of the following reactions is : N 2 (g) + 3H 2 (g) ⎯→ 2NH 3 (g)
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(– 12 kJ)
Δ H = 6 × Δ H N–H – Δ H N ≡ N – 3 Δ H H–H = – 12 kJ
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