Two fluids aro separated by a membrane permeable only to species $a.$ Fluid $1$ is well mixed. The concentration of species $a$ is Cao everywhere within this fluid, and the temperature in fluid I is held constant at To$.$ Species a diffuses through stagnant fluid II and undergoes a first$-$order reaction $(ab)$ to form species $b$ within the fluid. Fluid I is replenished with $a,$ while fluid II has an outlet $($not shown$)$ to remove excess a and $b.$ Predict both the concentration distribution and the temperature distribution in the system. Assume a is sparingly soluble in Fluidll.