To solve this assignment: • • Handwritten work on A4 unruled sheet is acceptable Club all the pages of your solution and upload a single Pdf • Plag of any kind is not acceptable Try to provide detailed work with proper explanation 29.11 In a wastewater treatment process, we are concerned about the possible release of the aromatic hydrocarbon benzene to the atmosphere. In the present process, 3.0 gmole/m³ of benzene (solute A, mol. weight 78 g/gmole, C6H6) dissolved in water is exposed to air which contains no benzene vapor in the bulk gas phase, i.e. YA ≈0. The mass transfer coefficients for solute A are kg = 3.0 x 103 gmole/m² s atm, and k₁ = 2.0 gmole/m's for the gas and liquid films respectively. The process temperature is 20 C, the total system pressure is 1.0 atm. At 20 C, the solubility of benzene vapor in water follows Henry's law with H = 4.0 m³ atm/kgmole. The density of the wastewater is 1000 kg/m³. a. What are CAL and PA*? b. Draw in the operating point directly on the equilibrium diagram. Is the process gas absorption or liquid stripping? Why? c. What is the overall mass transfer coefficient based on the overall gas phase driving force? d. What is the flux NA? e. What is the partial pressure of solute A right at the gas/liquid interface?