The device for measuring the diffusion coefficient of vapor–gas mixtures is shown in the bellow figure. The water evaporates into the air through the mouth of the tube. The concentration of the vapor at the exit plane is negligible. The length of tube L is 200 mm. Calculate the evaporation rate (kg/h•m2) when the pressure and temperature in the chamber are maintained at 0.4 atm and 350 K, respectively. The saturation pressure for water at T = 350 K is 0.1 bar. When the pressure and temperature are 1 atm and 298 K, the mass diffusivity DAB is 0.26 × 10–4 m2/s.
The device for measuring the diffusion coefficient of vapor–gas mixtures is shown in the bellow figure. The water evaporates into the air through the mouth of the tube. The concentration of the vapor at the exit plane is negligible. The length of tube L is 200 mm. Calculate the evaporation rate (kg/h•m2) when the pressure and temperature in the chamber are maintained at 0.4 atm and 350 K, respectively. The saturation pressure for water at T = 350 K is 0.1 bar. When the pressure and temperature are 1 atm and 298 K, the mass diffusivity DAB is 0.26 × 10–4 m2/s.
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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The device for measuring the diffusion coefficient of vapor–gas mixtures is shown in the bellow figure. The water evaporates into the air through the mouth of the tube. The concentration of the vapor at the exit plane is negligible. The length of tube L is 200 mm.
Calculate the evaporation rate (kg/h•m2) when the pressure and temperature in the chamber are maintained at 0.4 atm and 350 K, respectively. The saturation pressure for water at T = 350 K is 0.1 bar. When the pressure and temperature are 1 atm and 298 K, the mass diffusivity DAB is 0.26 × 10–4 m2/s.
Transcribed Image Text:Q1. The device for measuring the diffusion coefficient of vapor-gas mixtures is shown in the bellow
figure. The water evaporates into the air through the mouth of the tube. The concentration of the vapor
at the exit plane is negligible. The length of tube L is 200 mm.
Calculate the evaporation rate (kg/h•m?) when the pressure and temperature in the chamber are
maintained at 0.4 atm and 350 K, respectively. The saturation pressure for water at T = 350 K is 0.1
bar. When the pressure and temperature are 1 atm and 298 K, the mass diffusivity DAB is 0.26 × 104
m2/s.
Thermostated chamber
Air (B)
p= 0.4 atm, T = 350 K
Water (A)
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