Chapter 18, Problem 18.27QP

Hypothetical elements A(g) and B(g) are introduced into a container and allowed to react according to the reaction $\text{A}\left(g\right)+2\text{B}(g)\stackrel{}{\to }{\text{AB}}_2\left(g\right)$. The container depicts the reaction mixture after equilibrium has been attained.

1. a Is the value of ΔS for the reaction positive, negative, or zero?
2. b Is the value of ΔH for the reaction positive, negative, or zero?
3. c Prior to equilibrium, is the value of ΔG for the reaction positive, negative, or zero?
4. d At equilibrium, is the value of ΔG for the reaction positive, negative, or zero?