Using the following compressibility factor data for CO2 at 150 oC:

P (bar) Z

10 0.985

20 0.970

40 0.942

60 0.913

80 0.885

100 0.869

200 0.765

300 0.762

400 0.824

500 0.910

a) Prepare a linear fit of Z versus P for the first four points (up to 60 bar) and determine a value B’ (atm-1) for CO2 at 150 oC in the two-term virial equation.

b) Use your answer from part b) in the two-term virial equation to prepare a plot of the fugacity coefficient, , versus pressure (from 1 to 500 bar) for CO2 at 150 oC.

c) prepare a plot of (Z-1)/P versus P for CO2 at 150 oC.

d) Use your plot in part c) to obtain a relation for ln versus P and prepare a plot of the fugacity coefficient, , versus pressure (from 1 to 500 bar) for CO2 at 150 oC.

e) How do your answers from parts b) and d) compare? Give reasons for any agreement or disagreement.