Question: What is the relationship between H f H f for H ( g ) H ( g ) given in Exercise

What is the relationship between $Δ H_{f}^{\circ}$ for $H (g)$ given in Exercise 49 and the $H - H$ bond energy listed in Table 13.6?

Data from Exercises 49

Use the following standard enthalpies of formation to estimate the $N - H$ bond energy in ammonia. Compare this with the value in Table 13.6.
$N (g)$
$472.7 k J / m o l$
$H (g)$
$216.0 k J / m o l$
${N H}_{3} (g) - 46.1 k J / m o l$

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