Water at the bottom of a narrow metal tube is held at a constant temperature of 293 K. The total pressure of air (assumed dry) i
s 1.0 atm and the temperature is 293 K. Water evaporates and diffuses through the air in the tube, and the diffusion path is z2-z1 is 0.1524 m long. Calculate the rate of evaporation at steady state in kg mol/(m2-s). The diffusivity of water vapor at 298K is 0.30 x 10-4 m2/s
