Q2 a Methane is stored under pressure in a 1 m tank. The pressure in the tank is 20 bar and the temperature is 298 K. Calculate the compressibility factor of methane in the tank by using Pitzer correlation for second virial equation. (10 marks) (a) (b) Calculate the amount (moles) of methane in the tank. (4 marks) If you would like to store twice as much methane in the tank at the same temperature, calculate the pressure in the tank. (6 marks) Formula : a(T)R2T2 a(T) = 4 P. b=2 P. HOU+PV AEU-IS; G=HTS Pouble = *P RTC sat = RT 1 a(T) PE V - V(V+b) Paes Livi/P.sar 1 1.-1. = Pdew T P PE P. (2-3) Z = 1 + 8-98 (Z + 8)(2+08) 7.P.84* 72P. = Z = 8 + (Z + EB)(2+ + B) - 3 ni nie + Vis = 11 no + VE 48 nie + jj (i = 1,2,...) W