The irreversible reaction below is first order with respect to each reactant, and the reaction rate constant at 82C is 8.3 dm3 mol1 hr1.

ClCH2CH2OH + NaHCO3 HOCH2CH2OH + NaCl + CO2 ethylene sodium ethylene sodium carbon chlorohydrin bicarbonate glycol chloride dioxide

(iii) If the rate constant is 1 104 dm3 mol1 min1 at 305K and the initial concentration of ethylene chlorohydrin is 2.0 mol dm3, what will the conversion be after passing the reaction mixture through a Plug Flow Reactor (PFR) for 6 hours and 20 minutes?

[5 marks]

(b) The following first order reactions are to be carried out in a continuously stirred tank reactor (CSTR). The rate constants k1 and k2 are 0.5 h1 and 0.2 h1 respectively, and the initial concentration of A, CA0, is 2 mol m3.

k1

AB k2 BC

(i) Calculate the exit concentrations of A, B and C from the continuously stirred tank reactor (CTSR) if the average residence time is 2.3 h and CB0 and CC0 are both zero.