5. Explain the film theory and how the mass transfer coefficient is derived. 6. Explain with schematic plot the two film theory indicate PAL Al in equilibrium with what, PA and

CA are equilibrium with Ab what and show their equation. Define such equation. 7. Derive the following overall mass transfer coefficients based on liquid side and gas side driving forces: 1 H₂ = + KL kp KG 1 1 Hak (3-187) (3-191)