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The rate at which solid dissolves from a flat plate of solid benzoic acid in to water flowing past the solid at 300K and atmospheric pressure is found to be 1.8E-05 kmol/m2 s. The solubility of benzoic acid in water is 2.95E-2 kmol/m3 . The diffusivity of benzoic acid in water is 1.245E-09 m2 /s. Calculate (i) The mass transfer coefficient (ii) The film thickness using the film theory (iii) Contact time for penetration theory (iv) The fractional rate of surface renewal and average residence time.

The rate at which solid dissolves from a flat plate of solid benzoic acid in to water flowing past the solid at 300K and atmospheric pressure is found to be 1.8E-05 kmol/m2 s. The solubility of benzoic acid in water is 2.95E-2 kmol/m3 . The diffusivity of benzoic acid in water is 1.245E-09 m2 /s. Calculate (i) The mass transfer coefficient (ii) The film thickness using the film theory (iii) Contact time for penetration theory (iv) The fractional rate of surface renewal and average residence time.

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
Problem 1.1P
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Please answer part (iv) only last part, asap
The rate at which solid dissolves from a flat plate of solid benzoic acid in to water flowing past the solid at 300K and atmospheric pressure is found to be 1.8E-05 kmol/m2 s. The solubility of benzoic acid in water is 2.95E-2 kmol/m3 . The diffusivity of benzoic acid in water is 1.245E-09 m2 /s. Calculate (i) The mass transfer coefficient (ii) The film thickness using the film theory (iii) Contact time for penetration theory (iv) The fractional rate of surface renewal and average residence time.
Transcribed Image Text:The rate at which solid dissolves from a flat plate of solid benzoic acid in to water flowing past the solid at 300K and atmospheric pressure is found to be 1.8E-05 kmol/m2 s. The solubility of benzoic acid in water is 2.95E-2 kmol/m3 . The diffusivity of benzoic acid in water is 1.245E-09 m2 /s. Calculate (i) The mass transfer coefficient (ii) The film thickness using the film theory (iii) Contact time for penetration theory (iv) The fractional rate of surface renewal and average residence time.
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