A mass-transfer process is used to remove ammonia, NH 3 , solute A, from a mixture of NH 3 and air, using water as the solvent. The partial pressure of ammonia in the bulk gas phase is 0.2 atm, and...

A mass-transfer process is used to remove ammonia, NH₃, solute A, from a mixture of NH₃
and air, using water as the solvent. The partial pressure of ammonia in the bulk gas phase is 0.2 atm, and the mole fraction of dissolved ammonia in the water is 0.04. The total system pressure is 2.0 atm, and the temperature is 30C. The equilibrium distribution at 30C is shown in the figure:

At 30C, the molar solution density is 55.6 kg mol/m³. The film mass-transfer coefficient are k_G
 1.0 kg mol/m²
s atm and k_L
 0:045 m/s.

a. Evaluate k_x.

b. Determine the interfacial concentrations, cAi and pAi, What are x_Ai
and y_Ai?

c. Evaluate the overall mass-transfer coefficient, K_G

d. What is the flux, N_A, for this process?