Chem: Using Le Chatelier's principle, predict the direction of the net reaction in each of the following..

... equilibrium systems, as a result of increasing the pressure at constant temperature.
a) N2(g) + O2(g) <--> 2NO(g)
b) PCl5(g) <--> PCl3(g) + Cl2(g)
c) CO(g) + Cl2(g) <--> COCl2(g)

A) 2 volumes reactants - 2 volumes of product - no change ↔

B) 1 volume reactant - 2 volumes product - increase pressure moves reaction to reactant side ←

c) 2 volumes reactant - 1 volume product - increase pressure moves reaction to products side.→