Calculate the new partial pressure of each reactant

Question

Suppose at an initial partial pressure of 1.00 bar that in an industrial process N₂ is mixed with H₂ at an initial partial pressure of 3.00 bar and the two gases are allowed to come to equilibrium with the product ammonia in the presence of a catalyst in a reactor of constant volume. The reaction is N₂ + 3H₂ ---->2NH₃. It has been determined experimentally that K_p = 977 at the temperature of the reaction,.
1. Calculate the equilibrium partial pressures of the three gases?

2. Calculate the new partial pressure of each reactant in the vessel after equilibrium is reestablished. Suppose the volume of the container is suddenly reduced to one half via a piston mechanism.