CO 1. (30 Points) Liquid (A) evaporates at one end of a capillary tube and the vapor diffuses towards the other end, whi

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Co 1 30 Points Liquid A Evaporates At One End Of A Capillary Tube And The Vapor Diffuses Towards The Other End Whi 1 (42.24 KiB) Viewed 29 times

CO 1. (30 Points) Liquid (A) evaporates at one end of a capillary tube and the vapor diffuses towards the other end, which is open to a large gas space B that is essentially free of A. Assuming gas gas B is insoluble in the liquid) and the following conditions and properties: Total Pressure Vapor Pressure of A at 20° C P = 101.3 kPa PA = 70.0 kPa T = 20° C Temperature Capillary dimensions L = 10 cm, d = 2 cm Molecular weight MA = 78, MB = 28 DAB = 0.245 cm²/s Binary Diffusivity a. (5 points) Show that under these conditions, the flux of A is given by DABP P NA RTL P-PAI b. (10 points) Calculate the flux of A? c. (5 points) What is the rate of evaporation of A in g/day? d. (5 points) what is the impact of increasing temperature on the rate of evaporation, why? (5 points) How would the rate of evaporation change if the liquid contains 50 mole % A and 50 mole % nonvolatile C?