A binary gaseous mixture of methane (1)-butane (2) is contained in a vessel at 318.9K and 30.4 bar with y1=0.6. For n-butane at 318.9K the vapor pressure is 4.4 bar and the molar volume is 170cm3mole1. 1) Determine the fugacity coefficient and the fugacity (^2v and f^2v) for n-butane when: a) the gas is assumed an ideal gas [5] b) the gas is a real gas mixture obeying Virial EOS with B11=34.7;B22=626.3; and B12=156.1cm3mole1 at 318.9K [15] 2) Calculate 2sat at 318.9K and the corresponding vapor pressure. [15] 3) Calculate the fugacity of pure n-butane at 318.9K and 150 bar. [15]