Chapter 18, Problem 14PS

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

1. (a) C₆H₁₂O₆(s) + 6 O₂(g) → 6 CO₂(g) + 6 H₂O(ℓ)

   Δ_rH° = −673 kj/mol-rxn

   Δ_rS° = 60.4 j/K · mol-rxn

2. (b) MgO(s) + C(graphite) → Mg(s) + CO(g)

   Δ_rH° = 490.7 kJ/mol-rxn

   Δ_rS° = 197.9 J/K · mol-rxn

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