For this problem, we have to calculate the enthalpy of reaction (ΔH) of the formation of ammonia
N2 (g) + 3 H2 (g) → 2 NH3 (l)
Recall that the change of enthalpy for a chemical reaction (ΔH) can be calculated using bond energies:
To determine the enthalpy of reaction, we need to first see what bonds are present in the reactants and the products.
Calculate the enthalpy of formation of ammonia from the following bond energy data:
(N−N) bond =398 kJmol−1
(H−H) bond =435 kJmol −1
and (N≡N) bond =945.36 kJmol−1
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