(iii). Aerated water flows through a cylindrical tube of inner radius 1 cm. The tube wall is porous and has a thickness 0.2 cm. The outer surface of the tube is in contact with pure solvent at a pressure lower than that inside the tube. The mass transfer rate of air per until length of the tube is 0.05 g/s. Estimate the mass transfer rate for a similar process in which the tube used is of the same material, porosity and inner diameter, but has a wall thickness of 0.4 cm. (iv). In an experiment, a naphthalene ball of radius 2 cm was found to dissolve into air in 10 days. Estimate the time required for a ball of radius 4 cm to dissolve under identical environmental conditions. (v). State whether the following assertion is true or false. Briefly justify your answer. "In a steady state diffusion process, mass flux is constant with respect to the distance from the source."

(iii). Aerated water flows through a cylindrical tube of inner radius 1 cm. The tube wall is porous and has a thickness 0.2 cm. The outer surface of the tube is in contact with pure solvent at a pressure lower than that inside the tube. The mass transfer rate of air per until length of the tube is 0.05 g/s. Estimate the mass transfer rate for a similar process in which the tube used is of the same material, porosity and inner diameter, but has a wall thickness of 0.4 cm. (iv). In an experiment, a naphthalene ball of radius 2 cm was found to dissolve into air in 10 days. Estimate the time required for a ball of radius 4 cm to dissolve under identical environmental conditions. (v). State whether the following assertion is true or false. Briefly justify your answer. "In a steady state diffusion process, mass flux is constant with respect to the distance from the source."

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Question

(iii). Aerated water flows through a cylindrical tube of inner radius 1 cm. The tube wall is
porous and has a thickness 0.2 cm. The outer surface of the tube is in contact with pure solvent
at a pressure lower than that inside the tube. The mass transfer rate of air per until length of
the tube is 0.05 g/s. Estimate the mass transfer rate for a similar process in which the tube used
is of the same material, porosity and inner diameter, but has a wall thickness of 0.4 cm.
(iv). In an experiment, a naphthalene ball of radius 2 cm was found to dissolve into air in 10
days. Estimate the time required for a ball of radius 4 cm to dissolve under identical
environmental conditions.
(v). State whether the following assertion is true or false. Briefly justify your answer.
"In a steady state diffusion process, mass flux is constant with respect to the distance from the
source."

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