please gelp with all

Problem 3. (30 Points) You are testing gas permeation through a bilayer film consisting of a polyethylene layer (1) and a nylon layer (II). You don't know the thickness of either layer (Lor L.), but you know the following permeabilities: ; PLO2 = 0.029 x 102 m2 02(STP) msolid-atm m. 02(STP) Oxygen permeabilities: Pio2 = 4.17 x1012 msolid atm m N2(STP) m solid atm Nitrogen permeabilities: Pin2 = 1.52 x 1012 mosolid atm PUN2 = 0.0152 x 10-12 m Nz(STP) You measure the flux of nitrogen and oxygen through the bilayer film using a pressure drop of 6.5 atm: Nitrogen: Na = 1.60 x 100 kgmol/sm? Oxygen: NA = 3.17 x 10 kgmol/sm? What is the thickness of the nylon layer (L.) in mm? 4. (20 points) one is evaporating from a beaker at a constant temperature of 420 "Cand a pressure of at The peaker is 25.0 cm in height and is initially filled with toluene to a depth of 150 cm Pure it is blowing across the top of the beaker. The diffusivity of toluene in air is Du = 0.086 cm/s at 25.9 C. The vapor pressure of toluene at 42.0 *C is p* = 64.2 mmHg. Determine the initial flux of toluene, N., in kgmol/m s when the evaporation process starts AND the final flux, Nas, in kgmol/m s' when the last of the toluene evaporates Problem 2. (30 points) A delayed release drug consists of a pharmaceutical molecule (A) that is contained inside a spherical polymer shell (B). The drug must diffuse through the shell before it can be delivered into the surrounding environment. The concentration of the drug is Car = 0.235 mol/m'at the inner surface of the shell and is negligible at the outer surface. The diffusivity of drug (A) in polymer (B) is Das = 1.46 x 10-12 m/s. Determine the total molar rate of A being released from the capsule (NA) in gmol/s as well as the flux of A at the outer surface in gmol/(s m). 11 = 0.03 mm; 12 = 0.05 mm