The reaction a b is to be carried out isothermally in a continuous-flow reactor. the entering volumetric flow rate v0 is 10 dm3/h. (note: . for a constant volumetric flow rate , then . also, .) calculate both the cstr and pfr reactor volumes necessary to consume 99% of a (i. e., ca = 0.01ca0 ) when the entering molar flow rate is 5 mol/h, assuming the reaction rate –ra is (a) –ra = k with k = 0.05 [ans.: vcstr = 99 dm3] (b) –ra = kca with k = 0.0001 s–1 (c) –ra = with k = 300 [ans.: vcstr = 660 dm3] (d) repeat (a), (b), and/or (c) to calculate the time necessary to consume 99.9% of species a in a 1000 dm3 constant-volume batch reactor with ca0 = 0.5 mol/dm3