A long glass capillary with a diameter of 0.1 cm is in contact with water on one side and dry air on the other. Water vapor evaporates from the side in contact with water and diffuses through the capillary to the other side. Using the following given data, calculate the rate at which water evaporates in this system in [g/s]. Isothermal diffusion (20℃) Vapor pressure of water 17.5 mmHg (20℃) Water diffusivity 0.3 cm2/s (20℃) Dry air pressure 760 mmHg Dural length 10 cm Gas constant R=82 cm3atm/mol K 18 g/mol molecular weight of water

Introduction to Chemical Engineering Thermodynamics
8th Edition
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Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
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Chapter1: Introduction
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A long glass capillary with a diameter of 0.1 cm is in contact with water on one side and dry air on the other. Water vapor evaporates from the side in contact with water and diffuses through the capillary to the other side. Using the following given data, calculate the rate at which water evaporates in this system in [g/s].
Isothermal diffusion (20℃)
Vapor pressure of water 17.5 mmHg (20℃)
Water diffusivity 0.3 cm2/s (20℃)
Dry air pressure 760 mmHg
Dural length 10 cm
Gas constant R=82 cm3atm/mol K
18 g/mol molecular weight of water

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