An important industrial source of ethanol is the reaction, catalyzed by H₃PO₄, of steam with ethylene derived from oil:C₂H₄(g) + H₂O(g) ⇄ C₂H₅OH(g)ΔH°rxn = -47.8kj Kc = 9 ×10³ at 600K(a) At equilibrium,P_C₂H₅OH = 200. atm and P_H₂O = 400. atm. Calculate P_C₂H₄.