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60 equivalent behavior 12.11 Given Actual U₂=20 Ideal 2 U=100 CA3 = 40 CAS = 40 3 4 5 V=2m3 2m3 dead = ? V=4m3 mixing point First let CAO = It is not necessary to do this, but this = 100 assumption makes the calculations Now take a material balance about the mixing point CA2 + = CA4 or 20 (100) + 80 CA3 = 100(40) or CA3 = + 20 (100) =75 80 Next evaluate the rate constant k from the actual 2m3 MFR For a 2nd order reaction A+B R+S CAO=CB CAO have = V = k A3 or k = CAO V 5 = 100-75 (75)2 80 2 = 14.222 Finally, for the ideal reactor Videal CAS This is somuch smaller = v than 6m3 or V = k CAS 5 = 100-40 100 = 0.2637 m3 3 14.22 (40)2