Air at 25°C with a dew-point temperature of 0°C flows past the open end of a vertical tube filled with liquid water maintained at 25°C. The tube has an inside diameter of 0.83 in., and the liquid level was originally 0.5 in. below the top of the tube. The diffusivity of water in air at 25°C is 0.256 cm2/s.
(a) How long will it take for the liquid level in the tube to drop 3 in.?
(b) Make a plot of the liquid level in the tube as a function of time for this period.