Given the Average Bond Energies Listed Below, Estimate D H

question 117

Multiple Choice

Given the average bond energies listed below, estimate D H for the following reaction:
3 H₂ + N₂→2 NH₃ D H _rxn = ??
Average Bond Energies:
H - H₄36 kJ/mol N º N 946 kJ/mol N - N 163 kJ/mol N - H 389 kJ/mol

• A) - 80 kJ
• B) 1087 kJ
• C) - 120 kJ
• D) 220 kJ
• E) none of these

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