You place the substance A(g) in a container. Consider the following reaction under standard conditions to produce the substance B(g):

For this reaction as written, the equilibrium constant is a very large, positive number.
a. When A(g) reacts to give B(g), does the standard free energy (Go) of the reaction change as the reaction proceeds or does it remain constant? Explain.
b. When A(g) reacts to give B(g), does the free energy (G) of the reaction change as the reaction proceeds, or does it remain constant? Explain.
c. Is this reaction spontaneous? How do you know?
d. When the reaction reaches equilibrium, is the following statement true: ˆ†Go = ˆ†G = 0? If not, what can you say about the values of ˆ†Go and ˆ†G when equilibrium has been reached?
e. When the reaction has reached equilibrium, what can you say about the composition of the reaction mixture? Is it mostly A(g), is it mostly B(g), or is it something close to equal amounts of A(g) and B(g)?
f. Now consider running the reaction in reverse: B(g) †’ ±£ A(g). For the reaction as written, what can you say about ˆ†Go, ˆ†G, the equilibrium constant, and the composition of the reaction mixture at equilibrium? Also, is the reaction spontaneous in this direction?

A(g) = Big)