Question: DO NOT COPY ANSWERS FROM OTHERS. 1. Liquid hexane is placed in a vertical glass tube of inside diameter 0.95cm. The tube is closed at

DO NOT COPY ANSWERS FROM OTHERS.

1. Liquid hexane is placed in a vertical glass tube of inside diameter 0.95cm. The tube is closed at the bottom and open, at the top, to air flowing at a uniform pressure of 0.94atm. The tube assembly is immersed in a constant temperature bath maintained at 19C. The hexane evaporates and diffuses through the air column in the tube. The loss in volume of liquid hexane is recorded as a function of time, and a set of data is shown in the figure at left. The initial length of the air column above the hexane surface is 15.6cm. Calculate the diffusion coefficient of hexane through air from these data. The vapor pressure of hexane at 19C is 1.5104Pa, and the density of the liquid is 0.66g/cm3

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