3.3 An insulated glass tube and condenser are mounted on reboiler containing benzene and toluene. The condenser returns liq uid reflux so that it runs down the wall of the tube. At one point in the tube the temperature is 170°F, the vapor contains 30 mol% toluene, and the liquid reflux contains 40 mol % toluene. The effec tive thickness of the stagnant vapor film is estimated to be 0.1 in The molar latent heats of benzene and toluene are equal. Calculate the rate at which toluene and benzene are being interchanged by equimolar countercurrent diffusion at this point in the tube i lbmol/h-ft². Diffusivity of toluene in benzene = 0.2 ft²/h. Pressure = 1 atm total pressure (in the tube). Vapor pressure of toluene at 170°F = 400 torr.
3.3 An insulated glass tube and condenser are mounted on reboiler containing benzene and toluene. The condenser returns liq uid reflux so that it runs down the wall of the tube. At one point in the tube the temperature is 170°F, the vapor contains 30 mol% toluene, and the liquid reflux contains 40 mol % toluene. The effec tive thickness of the stagnant vapor film is estimated to be 0.1 in The molar latent heats of benzene and toluene are equal. Calculate the rate at which toluene and benzene are being interchanged by equimolar countercurrent diffusion at this point in the tube i lbmol/h-ft². Diffusivity of toluene in benzene = 0.2 ft²/h. Pressure = 1 atm total pressure (in the tube). Vapor pressure of toluene at 170°F = 400 torr.
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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Transcribed Image Text:**3.3 Diffusion in a Glass Tube**
An insulated glass tube and condenser are mounted on a reboiler containing benzene and toluene. The condenser returns liquid reflux so that it runs down the wall of the tube. At one point in the tube, the temperature is 170°F. The vapor contains 30 mol% toluene, and the liquid reflux contains 40 mol% toluene. The effective thickness of the stagnant vapor film is estimated to be 0.1 in.
The molar latent heats of benzene and toluene are equal. Calculate the rate at which toluene and benzene are being interchanged by equimolar countercurrent diffusion at this point in the tube, in lbmol/h-ft².
- **Diffusivity of toluene in benzene** = 0.2 ft²/h.
- **Pressure** = 1 atm total pressure (in the tube).
- **Vapor pressure of toluene at 170°F** = 400 torr.
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