Problem 1: Water in the bottom of a narrow metal tube is held at a constant temperature of 298 K. The dry ambient air outside the tube is at 1 atm (101.3 kPa) and 298 K. Water evaporates and diffuses - through the air in the tube, and the diffusion path z2z₁ is 50 cm long. Calculate the rate of evaporation at steady state in mol/s-cm². The diffusivity of water vapor (A) in air (B) at 1 atm and 298 K is 0.250 cm²/s. Assume that air is insoluble in water. Air (B) 2 NA 1 Water (A)