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. Q1. The device for measuring the diffusion coefficient of vapor-gas mixtures is shown in the bellowfigure. The water evaporates into the air through the mouth of the tube. The concentration of the vaporat 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 aremaintained at 0.4 atm and 350 K, respectively. The saturation pressure for water at T = 350 K is 0.1bar. When the pressure and temperature are 1 atm and 298 K, the mass diffusivity DAB is 0.26 × 104m2/s.Thermostated chamberAir (B)p= 0.4 atm, T = 350 KWater (A)

Given that :Z =200 mm = 0.2 mP=0.4 atm = 0.4 x101325 =40530 PaP1 = 0.1 bar =10000 Pa = 0.0987 atm…

Answered: The device for measuring the diffusion…

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.