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The rate of evaporation of water from a surface maintained at a temperature of 60°C is 2.71 x 104 kg/s m². What will be the rate of evaporation of benzene from a similar surface but maintained at 26°C. If the effective film thickness is the same in both the cases. Given: v.p of water at 60°C = 149 mm Hg v.p of benzene at 26°C = 99.5 mm Hg Diffusivity of air-water vapour at 26°C = 2.6 x 10-5 m2/s Diffusivity of air-benzene vapour at 60°C= 0.98 x 10-5 m²/s Atm. pressure in both the cases = 1.013 x 105 N/m²

The rate of evaporation of water from a surface maintained at a temperature of 60°C is 2.71 x 104 kg/s m². What will be the rate of evaporation of benzene from a similar surface but maintained at 26°C. If the effective film thickness is the same in both the cases. Given: v.p of water at 60°C = 149 mm Hg v.p of benzene at 26°C = 99.5 mm Hg Diffusivity of air-water vapour at 26°C = 2.6 x 10-5 m2/s Diffusivity of air-benzene vapour at 60°C= 0.98 x 10-5 m²/s Atm. pressure in both the cases = 1.013 x 105 N/m²

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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A The rate of evaporation of water from a surface maintained at a temperature of 60°C is 2.71 x 104 kg/s m². What will be the rate of evaporation of benzene from a similar surface but maintained at 26°C. If the effective film thickness is the same in both the cases. Given: v.p of water at 60°C = 149 mm Hg v.p of benzene at 26°C = 99.5 mm Hg Diffusivity of air-water vapour at 26°C = 2.6 x 10-5 m²/s Diffusivity of air-benzene vapour at 60°C= 0.98 x 10-5 m2/s Atm. pressure in both the cases: 1.013 x 105 N/m2
Transcribed Image Text:A The rate of evaporation of water from a surface maintained at a temperature of 60°C is 2.71 x 104 kg/s m². What will be the rate of evaporation of benzene from a similar surface but maintained at 26°C. If the effective film thickness is the same in both the cases. Given: v.p of water at 60°C = 149 mm Hg v.p of benzene at 26°C = 99.5 mm Hg Diffusivity of air-water vapour at 26°C = 2.6 x 10-5 m²/s Diffusivity of air-benzene vapour at 60°C= 0.98 x 10-5 m2/s Atm. pressure in both the cases: 1.013 x 105 N/m2
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