Hypothetical elements A(g) and B(g) are introduced into a container and allowed to react according to the reaction A(g) 2B(g) ±£ AB2(g). The container depicts the reaction mixture after equilibrium has been attained.

a. Is the value of ˆ†S for the reaction positive, negative, or zero?
b. Is the value of ˆ†H for the reaction positive, negative, or zero?
c. Prior to equilibrium, is the value of ˆ†G for the reaction positive, negative, or zero?
d. At equilibrium, is the value of ˆ†G for the reaction positive, negative, or zero?

= A = B