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6. Diffusivity. the diffusivity of volatile solvents is frequently measured using an Arnold cell. Here, a vertical glass tube 10 cm in length with a surface area (S =1 cm²) is filled to the top with dichloromethane and placed at 24°C and standard atmospheric pressure while dry air is blown over the top. The entire column of dichloromethane takes 12 hrs to evaporate. a b) c) What is the diffusion coefficient of dichloromethane in air under these conditions? Useful info: the vapor pressure of dichloromethane at 24°C is 400 mmHg (53.3kN/m²), MW=84.9 g/mol, PA = 1.33g/cm³. Would the results in part (a) change if the tube had a larger cross-sectional surface area? Explain. Based on your results in part (a), what would be the diffusivity of dichloromethane be in air at

6. Diffusivity. the diffusivity of volatile solvents is frequently measured using an Arnold cell. Here, a vertical glass tube 10 cm in length with a surface area (S =1 cm²) is filled to the top with dichloromethane and placed at 24°C and standard atmospheric pressure while dry air is blown over the top. The entire column of dichloromethane takes 12 hrs to evaporate. a b) c) What is the diffusion coefficient of dichloromethane in air under these conditions? Useful info: the vapor pressure of dichloromethane at 24°C is 400 mmHg (53.3kN/m²), MW=84.9 g/mol, PA = 1.33g/cm³. Would the results in part (a) change if the tube had a larger cross-sectional surface area? Explain. Based on your results in part (a), what would be the diffusivity of dichloromethane be in air at

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
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6. Diffusivity. the diffusivity of volatile solvents is frequently measured using an Arnold cell. Here, a vertical glass tube 10 cm in length with a surface area (S =1 cm²) is filled to the top with dichloromethane and placed at 24°℃ and standard atmospheric pressure while dry air is blown over the top. The entire column of dichloromethane takes 12 hrs to evaporate. a b) c) What is the diffusion coefficient of dichloromethane in air under these conditions? Useful info: the vapor pressure of dichloromethane at 24°C is 400 mmHg (53.3kN/m²), MW=84.9 g/mol, pa = 1.33g/cm³. Would the results in part (a) change if the tube had a larger cross-sectional surface area? Explain. Based on your results in part (a), what would be the diffusivity of dichloromethane be in air at 50°C?
Transcribed Image Text:6. Diffusivity. the diffusivity of volatile solvents is frequently measured using an Arnold cell. Here, a vertical glass tube 10 cm in length with a surface area (S =1 cm²) is filled to the top with dichloromethane and placed at 24°℃ and standard atmospheric pressure while dry air is blown over the top. The entire column of dichloromethane takes 12 hrs to evaporate. a b) c) What is the diffusion coefficient of dichloromethane in air under these conditions? Useful info: the vapor pressure of dichloromethane at 24°C is 400 mmHg (53.3kN/m²), MW=84.9 g/mol, pa = 1.33g/cm³. Would the results in part (a) change if the tube had a larger cross-sectional surface area? Explain. Based on your results in part (a), what would be the diffusivity of dichloromethane be in air at 50°C?
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