Equilibrium Systems?

Question

What is the effect, if any, on the following equilibrium system if the volume was reduced? Explain.

2IBr --> I2 + Br2

Answer 1

No change. There are two molecules on the left, two on theright. So if V goes down, P goes up, but there is no effect on the equilibrium. Similarly if T goes up.

Answer 2

There will be no shift in equilibrium concentrations. There are two molecules on the left and two on the right, so the increased pressure cannot be relieved by forming less molecules.