d. Pressure, kPa 2. a. b. [PVTsim] This is a question regarding phase envelope and equilibrium concept. Using PVTsim with the PR EOS, show the following on the same P-T figure: PT cross section for the equimolar mixture of C₂ and nCs Vapor pressure curve of C2 Vapor pressure curve of nCs. Indicate the critical point of the equimolar mixture clearly. On the same figure, add another PT cross section for 10 mol% C₂ and 90 mol% nCs. Indicate clearly the critical point for this mixture. 7000 C2 -nC5 10 mol% C2 +90 mol% nC5 CP 10 mol% C2+ 90 mol% nC5 50 mol% C2 +50 mol% nC5 CP 50 mol% C2 + 50 mol% nC5 6000 5000 4000 3000 2000 1000 Critical point Critical point 0 250 300 350 400 450 500 Temperature, K C. Consider the mixing of two fluids and y, where =[0] and y=0.5] That is, represents 10 mol% C₂ and 90 mol% 10.9 nCs (part "b"), and represents the equimolar mixture (part "a"). Read the 2 (approximate) intersection of the dew-point curve for y and the bubble-point curve of x. It is approximately 370 K and 1255 kPa. Consider the mixing of L moles of What is the resulting overall composition Perform PT flash for that overall composition from part "c" (i.e., the intersection). with V moles of y, in which L+V = 1. (you can pick a value for L. 0