Only #3, and 4

! L B D Two containers (A and B) are connected using a pipe (length:L=20cm, diameter: D). Both A and B are filled with stagnant acetic acid aqueous solution. In container A, acetic acid concentration is 2.0 mol/L. In container B, acetic acid concentration is 0.1 mol/L. The whole system is at the same temperature and pressure. (20 pt) The diffusivity parameters of acetic acid in water: Table 1: Diffusivity of acetic acid in water. Solute(1) Solvent(2) TOC Diffusivity Di2 (m/s(10")) acetic acid water 10 0.77 acetic acid water 25 1.26 Assuming the system is at steady state. Calcualte: 1. What is the flux of acetic acid in the pipe for the system temperature T=10C and T=25C? (5 pt) 2. If you want to control the total diffusive mass transfer rate from A to B less than 3.4 x 10-mol/hr at 25C, what is the maximum pipe diameter you should choose for this process? (5 pt) 3. What is the estimated flux of acetic acid if the system temperature is 40C (assuming n in Stocks-Einstein equation is constant from 0C to 40C)(5 pt) 4. What if the pipe is loaded with a porous inert catalyst (no reactions), what is the flux of acetic acid at 25C? The parameters for the porous material (=0.35, tortuosity (t)=1.2) (5 pt)