Use the following standard enthalpies of formation to
Chapter 8, Problem 76(choose chapter or problem)
Use the following standard enthalpies of formation to estimate the NH bond energy in ammonia: N(g), 472.7 kJ/mol; H(g), 216.0 kJ/mol; NH3(g), 46.1 kJ/mol. Compare your value to the one in Table 8.4
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