1. In a certain manufacturing plant an engineer observed a bulk air at 20.885 psf and 80.33 F. This is actually flowing on the top of the surface of a quite a thin flat sheet of solid C1oHs of length 7.87402 inches with a velocity of 44.7387 mph. Shown below are the data needed Mass diffusivity of CioHa vapor in air= 6 x 10-6 m2/s Kinematic viscosity of air: 1.5 x 10-5 m2/s Concentration of naphthalene in the air-solid naphthalene interface=1x 105 kmol/m3. Calculate the average mass transfer coefficient in kg mole/m?-s-kPa over the flat plate. а. 4.6 х 10-6 b. 5.6 x 10-6 C. 6.6 x 10-6 d. 7.6 x 10-6
1. In a certain manufacturing plant an engineer observed a bulk air at 20.885 psf and 80.33 F. This is actually flowing on the top of the surface of a quite a thin flat sheet of solid C1oHs of length 7.87402 inches with a velocity of 44.7387 mph. Shown below are the data needed Mass diffusivity of CioHa vapor in air= 6 x 10-6 m2/s Kinematic viscosity of air: 1.5 x 10-5 m2/s Concentration of naphthalene in the air-solid naphthalene interface=1x 105 kmol/m3. Calculate the average mass transfer coefficient in kg mole/m?-s-kPa over the flat plate. а. 4.6 х 10-6 b. 5.6 x 10-6 C. 6.6 x 10-6 d. 7.6 x 10-6
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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Transcribed Image Text:1. In a certain manufacturing plant an engineer observed a bulk air at 20.885 psf and
80.33 F. This is actually flowing on the top of the surface of a quite a thin flat sheet of
solid C1oHs of length 7.87402 inches with a velocity of 44.7387 mph. Shown below are
the data needed
Mass diffusivity of CioHa vapor in air= 6 x 10-6 m2/s
Kinematic viscosity of air: 1.5 x 10-5 m2/s
Concentration of naphthalene in the air-solid naphthalene interface=1x 105 kmol/m3.
Calculate the average mass transfer coefficient in kg mole/m?-s-kPa over the flat plate.
а. 4.6 х 10-6
b. 5.6 x 10-6
C. 6.6 x 10-6
d. 7.6 x 10-6
Expert Solution
Step 1
Given:
Air at Pressure=20.885 psf=1.000 kpa
Temperature=80.33 F=300K
Length=7.87402 inches=20cm=0.2m
velocity=44.7387 m/h=0.01242 m/s
Mass diffusivity of C10H8 vapor in air=6*10-6 m2/s
Kinematic viscosity of air =1.5*10-5 m2/s
concentration of naphthalene in the air solid naphthelene interfcace=1*105 kmole/m3
Required to find:
Average mass transfer coefficient over the plate?
The correlation for heat transfer is
similarly the analogy for mass transfer can be written as
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