A second order liquid phase reaction, A ? B, is carried out in a mixed flow reactor operated in semi batch mode (no exit stream). The reactant A at concentration CAF is fed to the reactor at a volumetric flow rate of F. The volume of the reacting mixture is V and the density of the liquid mixture is constant. The mass balance for A is_______________________?

A. d(VCA)/dt = -FCA kCA2V

B. d(VCA)/dt = FCAF kCA2V

C. d(VCA)/dt = F (CAF CA) kCA2V

D. d(VCA)/dt = -F (CAF CA) kCA2V

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