The binary system CO2 (1) and n-pentane (2) can be described by the SRK equation of state with k12=0.2. Use this equation of state to do the following:

(a) (15 points) Compute and plot the Pxy graph of this system at 280 K. Show the tie line at 30 bar. (b) (10 points) What is the phase of a mixture that contains 80% CO2 at 30 bar and 280 K? If a two-phase system, report the composition (x1, y1) and mole fractions L and V. (c) (15 points) Compute and plot the Txy graph for this system at 30 bar. Show the tie line at 280 K