To measure the efficiency of a certain type of distilled beverage distillation process, it's necessary to quantify the loss of ethanol in the bottom product, that is, to the air. In a experiment, a Stefan tube with a cross section of 8 cm² was used to quantify the ethanol diffusivity from the tank to the air. In the initial period, the ethanol surface was 10 cm from the top of the tube and after 10 hours it reached 25 cm, equivalent to 0.0445 cm³ of evaporated ethanol. So, find the mass diffusivity of ethanol in air. Information: • Ethanol vapor pressure: 0.0684 atm; • At the top of the tube, the ethanol concentration is zero.
To measure the efficiency of a certain type of distilled beverage distillation process, it's necessary to quantify the loss of ethanol in the bottom product, that is, to the air. In a experiment, a Stefan tube with a cross section of 8 cm² was used to quantify the ethanol diffusivity from the tank to the air. In the initial period, the ethanol surface was 10 cm from the top of the tube and after 10 hours it reached 25 cm, equivalent to 0.0445 cm³ of evaporated ethanol. So, find the mass diffusivity of ethanol in air. Information: • Ethanol vapor pressure: 0.0684 atm; • At the top of the tube, the ethanol concentration is zero.
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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To measure the efficiency of a certain type of distilled beverage distillation process, it's necessary to quantify the loss of ethanol in the bottom product, that is, to the air. In a experiment, a Stefan tube with a cross section of 8 cm² was used to quantify the ethanol diffusivity from the tank to the air. In the initial period, the ethanol surface was 10 cm from the top of the tube and after 10 hours it reached 25 cm, equivalent to 0.0445 cm³ of evaporated ethanol. So, find the mass diffusivity of ethanol in air.
Information:
• Ethanol vapor pressure: 0.0684 atm;
• At the top of the tube, the ethanol concentration is zero.
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