2. The homogeneous gas-phase decomposition of phosphine 4 PH3(g) → P4(g) + 6 H2 (g) proceeds at 649°C with the first-order rate -r(PH3) = (10/h) СPH3 a) What size of plug flow reactor (PFR) operating at 649°C and 460 kPa can produce 80% conversion of a feed consisting of 40 mol/h of pure phosphine? b) What size of plug flow reactor (PFR) operating at 649°C and 11.4 atm is needed for 75% conversion of 10 mol/hr of phosphine in a 2/3 phosphine-1/3 inert feed?