A gas diffusion apparatus is used to measure the diffusion coefficient of acetone (A) in air (B) at 28 o C. The capillary tube with a diameter of 2.0 mm is partially filled with pure liquid acetone and the temperature was allowed to stabilize at 28 o C. The recorded initial height is z o = 73.68 mm and after 20.0 minutes the height is z f = 73.90 mm. Calculate the experimental diffusion flux N A and the diffusion coefficient DAB.

Properties of Acetone at 28 o C : Density = 0.7822 g/cm3 , Vapor pressure = 261 mmHg

t=t0t=tf