The liquid-phase reaction A + B → C follows and elementary rate law and is carried

The liquid-phase reaction A + B → C follows and elementary rate law and is carried out isothermally in a flow system. The concentrations of A and B entering the reactor are 1 M. The
volumetric flow rate of the inlet stream is 10 dm3

/min. Two reactors are available. One is a gray
200 dm3 CSTR that can be heated to 77 °C or cooled to 0 °C. The other is a white 800 dm3 PFR
operated at 300 K that cannot be heated or cooled but can be painted red or black. Given: k =
0.07 dm3
/mol.min at 300 K and Ea = 20 kcal/mol.