Chapter 16, Problem 56E

Nitric acid, HNO₃, can be prepared by the following sequence of reactions:

$\begin{array}{l}4{\text{NH}}_3\left(g\right)+5{\text{O}}_2\left(g\right)\to 4\text{NO}\left(g\right)+6{\text{H}}_2\text{O}\left(g\right)\\ 2\text{NO}\left(g\right)+{\text{O}}_2\left(g\right)\to 2{\text{NO}}_2\left(g\right)\\ 3{\text{NO}}_2\left(g\right)+{\text{H}}_2\text{O}\left(l\right)\to 2{\text{HNO}}_3\left(l\right)+\text{NO}\left(g\right)\end{array}$

How much heat is evolved when 1 mol of NH₃(g) is converted to HNO₃(l)? Assume standard states at 25 °C.