3- For the following liquid phase parallel reaction system, A - R (desired) PR= k;Ca : k= 2 s A - S; rs= k2CA : k2= 1.5 s a-) Obtain the selectivity (Sra) expression. b-) Calculate the concentration of R at the reactor exit if the reaction is carried out in PFR and in CSTR (CAo=1 M, 9=10 L/s, overall conversion of A is 0.9) c-) Calculate the volume of PFR and CSTR reactors if the overall conversion of A is 0.9 (CAo=1 M). Note: Pure A is fed to the reactors.

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