Chapter 18, Problem 13PS

Classify each of the reactions according to one of the four reaction types summarized in Table 18.1.

1. (a) Fe₂O₃(s) + 2 Al(s) → 2 Fe(s) + Al₂O₃(s)

   Δ_rH° = −851.5 kj/mol-rxn

   Δ_rS° = −375.2 J/K · mol-rxn

2. (b) N₂(g) + 2 O₂(g) → 2 NO₂(g)

   Δ_rH° = 66.2 kJ/mol-rxn

   Δ_rS° = −121.6 J/K · mol-rxn

TABLE 18.1 Predicting Whether a Reaction Will Be Spontaneous Under Standard Conditions