15.4 The following diagram represents a reaction shown going
to completion. Each molecule in the diagram represents
0.1 mol, and the volume of the box is 1.0 L. (a) Letting
A = red spheres and B = blue spheres, write a balanced
equation for the reaction. (b) Write the equilibrium-
constant expression for the reaction. (c) Calculate the
value of K. (d) Assuming that all of the molecules are in
the gas phase, calculate An, the change in the number of
gas molecules that accompanies the reaction. (e) Calcu-
late the value of Kp.
