A filter behaves like a plug flow reactor with a first order reaction. The volume of

the filter is $10m^3$ and the flow rate is $0\mathrm{.}5\frac{m^3}{m}in.$ The first order rate constant for

the reaction is $0\mathrm{.}4mi{n}^{-1}.$ If a contaminant enters with a concentration of $50mM,$

what is the exit concentration?

A tank behaves like a CSTR with a first order reaction. The volume of the filter is

$10m^3$ and the flow rate is $0\mathrm{.}5\frac{m^3}{m}in.$ The first order rate constant for the reaction

is $0\mathrm{.}4mi{n}^{-1}.$ If a contaminant enters with a concentration of $50mM,$ what is the

exit concentration? Why might this concentration be different than the PFR in

Problem $2?$