A flat plate coated with a layer of volatile organic material is exposed to a parallel flow of air at 20°C with a free stream velocity of 5 m s^-1. Thelength of the flat plate in the direction of flow is 0.5 m. Estimate how long it will take for the average thickness of the volatile organic layer to decrease by 1 mm. The saturation concentration of the organic material in air at these conditions is 1.85x10^-9 mol/cm^3?, and its diffusivity in air is 0.068 cm^2 s^-1. The density of the volatile material as a solid is 1.21 g cm-3 and its MW is 140.2. Also the kinematic viscosity of air at these conditions is 0.155 cm^2? S^-1.
A flat plate coated with a layer of volatile organic material is exposed to a parallel flow of air at 20°C with a free stream velocity of 5 m s^-1. Thelength of the flat plate in the direction of flow is 0.5 m. Estimate how long it will take for the average thickness of the volatile organic layer to decrease by 1 mm. The saturation concentration of the organic material in air at these conditions is 1.85x10^-9 mol/cm^3?, and its diffusivity in air is 0.068 cm^2 s^-1. The density of the volatile material as a solid is 1.21 g cm-3 and its MW is 140.2. Also the kinematic viscosity of air at these conditions is 0.155 cm^2? S^-1.
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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A flat plate coated with a layer of volatile organic material is exposed to a parallel flow of air at 20°C with a free stream velocity of 5 m s^-1. Thelength of the flat plate in the direction of flow is 0.5 m. Estimate how long it will take for the average thickness of the volatile organic layer to decrease by 1 mm. The saturation concentration of the organic material in air at these conditions is 1.85x10^-9 mol/cm^3?, and its diffusivity in air is 0.068 cm^2 s^-1. The density of the volatile material as a solid is 1.21 g cm-3 and its MW is 140.2. Also the kinematic viscosity of air at these conditions is 0.155 cm^2? S^-1.
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