Ethanol is produced from ethylene via the gas-phase reaction

C₂H₄(g)  +  H₂O(g)  →  C₂H₅OH(g)

Reaction conditions are 400 K and 2 bar.
(a) Determine a numerical value for the equilibrium constant K for this reaction at 298.15 K.
(b) Determine a numerical value for K for this reaction at 400 K.
(c) Determine the composition of the equilibrium gas mixture for an equimolar feed containing only ethylene and H₂O. State all assumptions.
(d) For the same feed as in part (c), but for P = 1 bar, would the equilibrium mole fraction of ethanol be higher or lower? Explain.