A -^k1> R -^k2> S series reaction is carried out at a constant temperature in the following reactor systems:

a) A single 300 L CSTR, calculate the conversion of A reactant and the concentration of R at the reactor outlet.

b) A single 300 L PFR, calculate the conversion of A reactant and the concentration of R at the reactor outlet.

c) For options a and b, calculate the optimum residence time and reactor volumes that give the maximum concentration of R.

d) Two parallel CSTRs with equal volumes of 150 L are used. Calculate the conversion of A reactant and the concentration of R in the effluent streams of each reactor.

Additional data: k1 = 0.34 min^-1, k2 = 0.12 min^-1, Cao = 2.5 g-mol/L, V = 178 L/min, CR0 = CS0 = 0.