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A 4 mm diameter tube, 40 cm long, closed at one end and standing vertically on its closed end, is partially filled with a liquid up to 18 mm from the open top. A gentle stream of air is flowing across the top of the tube. The temperature of the liquid remains constant at 17°C. Diffusion takes place through the still air in the tube above the liquid. After 4 hours and 10 min the liquid level in the tube goes down by 9.5 mm. The vapor pressure of the liquid is 165 mm Hg and atmospheric pressure is 1 atm. Density of the liquid is 790 kg/m³. MW= 58. Calculate mass diffusivity of the liquid vapour in air.

A 4 mm diameter tube, 40 cm long, closed at one end and standing vertically on its closed end, is partially filled with a liquid up to 18 mm from the open top. A gentle stream of air is flowing across the top of the tube. The temperature of the liquid remains constant at 17°C. Diffusion takes place through the still air in the tube above the liquid. After 4 hours and 10 min the liquid level in the tube goes down by 9.5 mm. The vapor pressure of the liquid is 165 mm Hg and atmospheric pressure is 1 atm. Density of the liquid is 790 kg/m³. MW= 58. Calculate mass diffusivity of the liquid vapour in air.

Introduction to Chemical Engineering Thermodynamics
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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A 4 mm diameter tube, 40 cm long, closed at one end and standing vertically on its closed end, is partially filled with a liquid up to 18 mm from the open top. A gentle stream of air is flowing across the top of the tube. The temperature of the liquid remains constant at 17°C. Diffusion takes place through the still air in the tube above the liquid. After 4 hours and 10 min the liquid level in the tube goes down by 9.5 mm. The vapor pressure of the liquid is 165 mm Hg and atmospheric pressure is 1 atm. Density of the liquid is 790 kg/m³. MW= 58. Calculate mass diffusivity of the liquid vapour in air.
Transcribed Image Text:A 4 mm diameter tube, 40 cm long, closed at one end and standing vertically on its closed end, is partially filled with a liquid up to 18 mm from the open top. A gentle stream of air is flowing across the top of the tube. The temperature of the liquid remains constant at 17°C. Diffusion takes place through the still air in the tube above the liquid. After 4 hours and 10 min the liquid level in the tube goes down by 9.5 mm. The vapor pressure of the liquid is 165 mm Hg and atmospheric pressure is 1 atm. Density of the liquid is 790 kg/m³. MW= 58. Calculate mass diffusivity of the liquid vapour in air.
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