The following diagrams show an equilibrium mixture of O2 and O3 at temperatures T1 and T2...

The following diagrams show an equilibrium mixture of O2 and O3 at temperatures T1 and T2 (T2 > T1). (a) Write an equilibrium equation showing the forward reaction to be exothermic, (b) Predict how the number of O2 and O3 molecules would change if the volume were decreased at constant temperature.