ider the following system of gas$-$phase reactions: A X rx $=$ k$$C$^2$k$=0\mathrm{.}004($mol$/$dm$^3)/2$ min$-$ TBk$$CA k$=0\mathrm{.}3$ min$-1$ A B AY ry$=$k$3$C$$ ks $=0\mathrm{.}25$ dm$^3/$mol min B is the desired product, and X and Y are foul ollutants that are expensive to get rid of$.$ The specific reaction rates are at $27\backslash$deg C$.$ The reaction system is to be operated at $27\backslash$deg C and $4$ atm. Pure A enters the system at a volumetric flow rate of $10$ dm$^3/$min$.$

Suppose that E$1=20000$ cal$/$mol$,$ E$2=10000$ cal$/$mol$,$ E$3=30000$ cal$/$mol$.$ What temperature would you recommend for a single CSTR with a space time of $10$ min and an entering concentration of A of $0\mathrm{.}1$ mol$/$dm$^3"$