At moderate but not high pressures, the vapor phase of a binary mixture can be described by the following virial equation of state truncated at the second virial coefficient 

Write the expression for the vapor-phase fugacity of each species in this mixture in a form that contains only the temperature, the pressure, the composition and the virial coefficients, but does not contain the volume.

Transcribed Image Text:

with PV mix RT =1+ Bmix V mix Bmix = y₁B11 + 2y1y2 B12 + y²B22