If the area under the curve of \(\frac{1}{-r_A} \) versus XA for a PFR used to carry out an autocatalytic reaction is 5\((\frac{m^3 s}{mol}),\) then the ratio of change in volume to molar feed rate is ____(a) 5(b) 10(c) 15(d) 20This question was posed to me during a job interview.Enquiry is from Autocatalytic Reactions topic in portion Potpourri of Multiple Reactions, Design for Single & Parallel Reactions of Chemical Reaction Engineering

If the area under the curve of \(\frac{1}{-r_A} \) versus XA for a PFR

1.	If the area under the curve of \(\frac{1}{-r_A} \) versus XA for a PFR used to carry out an autocatalytic reaction is 5\((\frac{m^3 s}{mol}),\) then the ratio of change in volume to molar feed rate is ____(a) 5(b) 10(c) 15(d) 20This question was posed to me during a job interview.Enquiry is from Autocatalytic Reactions topic in portion Potpourri of Multiple Reactions, Design for Single & Parallel Reactions of Chemical Reaction Engineering
Answer» Right choice is (b) 10 The best EXPLANATION: For a PFR, FA0dXA=(-rA)dV The AREA under the curve of \(\frac{1}{-r_A} \)VERSUS XA = \(\frac{DXA}{(-rA)} = \frac{dV}{F_{A0}}\) = 5.

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