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Question 2: Products purity and feed flow rate in complete mixing model A binary mixture of gas A which has mole fraction of x = 0.5 and gas B is being fed at a flow rate of qf into a membrane module in order to effect seperation of the two gases. The membrane process is to be operated with a feed-side pressure of Ph = 80 cm Hg and permeate-side pressure of p = 20 cm Hg. Gas A has a permeability of PA = 400 × 10-10 cm³ (STP) cm/(s cm² cm Hg), and the separation factor between gas A and B is - . N a* = 10. If the thickness of the membrane is t = 2 x 10-³ cm and the fraction of the feed tha is permeated is 0 = 0.25, (a) Calculate the permeate composition, yp (b) Calculate the reject composition, xo (c) Calculate the feed flow rate, qf in cm³ (STP)/s if the available area of the memb is 3 x 108 cm²