A matter of mass transfer.

SO₂ is absorbed from air into water in a packed absorption tower. At a location in the tower, the mass-transfer flux is 0.0270 kmol SO₂/m² .h, and the liquid-phase mole fractions are 0.0025 and 0.0003, respectively, at the two-phase interface and in the bulk liquid.

If the diffusivity of SO₂ in water is 1.7 x 10-5 cm² /sec, determine the mass-transfer coefficient, kc, and the corresponding film thickness, neglecting the bulk flow effect.