### Mass of water vapor diffuses through tube

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##### Reference no: EM1382424

A lower tank contains water while an upper tank contains air with a negligible concentration of water vapor. A tube with a circular cross section and radius 0.050 m is inserted between the two tanks. The length of the tube is 0.25 m. The diffusion coefficient of water vapor through air is 2.4 x 10-5 m2/s. The concentration of water vapor just above the surface of the water is 1.7 x10-2 kg/m3. If the water vapor is removed from the upper tank so that the concentration there remains nearly zero, what mass of water vapor diffuses through the tube each hour?

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