Rectangular prism with sides of length a$,$ height L$,$ and exit end closed Consider a hollow catalyst pore. Diffusion only in the porous catalyst Let's assume the process is happening. Gas in these pore walls under isothermal conditions In phase $2,$ chemical A transforms into B according to the $2$nd order rate law. drawing a shape List your assumptions with reasons. The three$-$dimensional structure of A in the unstable state of the catalyst structure. Obtain the main differential equation showing the concentration distribution, CA$=$CA$($x$,$y$,$z$,$t$).$ border and Write the initial conditions. please can you draw and calculation very clearly.