2. Consider a liquid phase reaction A → C taking place in a PFR. (In practice liquid phase reaction rarely takes place in a PFR as the normal mode is either CSTR or batch.) Assume that rate can be represented by -A= kCA0(1-x) where CAO is the inlet concentration of A. The rate constant k is 0.25 h-¹. a) Find the residence time (V/vo) required for a conversion of 0.5. Ans. 2.77 h. b) If the same reaction is carried out in a CSTR would you expect the residence time to be higher, lower, or the same for a conversion of 0.5? Give a physical explanation for your answer and substantiate it with a calculation.