A wetted-wall column, as illustrated in Figure 30.4, is used as a mass-transfer device for transferring ethyl acetate liquid to an air stream by a mass-transfer limited evaporation process. At the current conditions of operation, the inlet air stream bulk velocity is 0.2m/s, the temperatures of the gas and the liquid are maintained at 27C, the total system pressure is 1.0 atm, the column diameter is 0.05m, the column length is 10m, and the vapor pressure of ethyl acetate is 0.080atm. Determine the mass-transfer coefficient for the process at the current conditions of operation. You may assume that the gas phase represents a dilute system