mass1

Question \#2 (a) What is the relationship between the fluxes for nquimolar-counter diffusion and stagnant systems? (b) Air flows through a cylindrical tube of naphthalene (A) at velocity of 10m/s. The diameter of the tube is 5cm and the temperature of air (B) is 40C. DAB=6.83106m2/s,Px at 40C=0.15 atm. air=1.123kg/m2, and ay=1.8105Ns/m2.Mwt,maghthalemu=128 and Mwc,ar of air =29. i. Calculate the mass transfer coefficient for transfer of naphthalene to air. ii. Estimate the mass flux from cylinder of naphthalene to air. (c) Activity coefficient for a binary liquid system can be presented by: ln(A)=0.479xA2, Use the modified Vignes equation to calculate the diffusion coefficient of equimolar ethanol-water mixture at. 25C. At infinite dilution, DABD=1.28109m2/s and DBA0=1.132109m2/s