In an experimentation, dry air flows upward through the core of a wetted column where water flows down the inside wall. The wetted column is a 25-mm ID and 1 m long. Dry air enters at the rate of 7 kg/m-s. The air is controlled everywhere at its average conditions of 309 K and 1 atm, the water at 294 K, and the mass-transfer coefficient 1 constant. Estimate the average partial pressure of water in the air leaving. Use the below equation for estimating the partial pressure of water. (14 marks) Paout = pa [1 exp (-4N5n CZDAP)] PA | GMD2 PA = partial pressure C = concentration z = length of the column DAB = diffusivity D = column diameter