TION 2 A feed mixture containing 100 kmol/h enters a flash drum at 690 kPa and 366.5K The feed contains 17, 23, 28, and 32 mol% propane, n-butane, n-pentane, and n- hexane, respectively. It can be assumed that equilibrium has been reached in the drum Tablo 2: The K-valuos Component 3.8 propane 1.5 n-butane 0.6 n-pentane 0.25 n-hexano 2.1 Calculate the equilibrium flowrate of the vapour and liquid streams leaving the flash drum. Iterate at least three times until the same result is obtained. (HINT Calculate the mole fraction of the feed that enters as vapour). (24) [24 Marks)