i- Estimate the diffusivity of carbon oxide (CO:) in air at 330 K and 1.2 bar applying the following formula and the data given in Table Ql. 0.98 3.03 - (10-3) T15 MOS AB DAB P MO5 AB where; DAB = diffusion coefficient, cm³/sec MA, MB = molecular weights of A and B, respectively T= temperature, "K P = Pressure, bar JAB= collision diameter, angstrom N, = diffusion collision integral, dimensionless Given the following: MAB = 2 G +) , JAB = 0.5(0Ą + og) , EAR ii- Given the data in (a), estimate the diffusivity at 440 K and 1.2 bar ii- Given the data in (a), estimate the diffusivity at 330 K and 2.5 bar iv- Assume the air is a mixture composed of 77.5% N2, 20.0% O:, 1.0% H;O and 1.5% CO: (molar basis). Estimate the diffusivity of CO; in the air, provided that: Dcoz-N = 8.3×10 m?isec, Dcozo: = 2.8×10* m²/sec, Dcoz-H20 = 8.3×10* m°/sec
i- Estimate the diffusivity of carbon oxide (CO:) in air at 330 K and 1.2 bar applying the following formula and the data given in Table Ql. 0.98 3.03 - (10-3) T15 MOS AB DAB P MO5 AB where; DAB = diffusion coefficient, cm³/sec MA, MB = molecular weights of A and B, respectively T= temperature, "K P = Pressure, bar JAB= collision diameter, angstrom N, = diffusion collision integral, dimensionless Given the following: MAB = 2 G +) , JAB = 0.5(0Ą + og) , EAR ii- Given the data in (a), estimate the diffusivity at 440 K and 1.2 bar ii- Given the data in (a), estimate the diffusivity at 330 K and 2.5 bar iv- Assume the air is a mixture composed of 77.5% N2, 20.0% O:, 1.0% H;O and 1.5% CO: (molar basis). Estimate the diffusivity of CO; in the air, provided that: Dcoz-N = 8.3×10 m?isec, Dcozo: = 2.8×10* m²/sec, Dcoz-H20 = 8.3×10* m°/sec
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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Question
Transcribed Image Text:DDOM
36 ull
CHPE305-Assig...
Q1)
i- Estimate the diffusivity of carbon oxide (CO2) in air at 330 K and 1.2 bar applying the
following formula and the data given in Table Q1.
(0.98'
3.03 -M
y (10-3) T15
MOS
AB
DAB =
P MO5
where;
DAB = diffusion coefficient, cm?/sec
MA , MB = molecular weights of A and B, respectively
T= temperature, "K
P = Pressure, bar
OAR= collision diameter, angstrom
n, = diffusion collision integral, dimensionless
Given the following:
-1
MAB = 2 (
OAR = 0.5(0A + OB) ,
0.5
EAB
EA
K
ii- Given the data in (a), estimate the diffusivity at 440 K and 1.2 bar
iii- Given the data in (a), estimate the diffusivity at 330 K and 2.5 bar
iv- Assume the air is a mixture composed of 77.5% N2, 20.0% O2, 1.0% H20 and 1.5%
CO2 (molar basis). Estimate the diffusivity of COz in the air, provided that:
Dco2-N: = 8.3x10s m?/sec, Dco2-02 = 2.8x10 m?/sec, Dco2-H20 = 8.3x10“ m/sec
(Table Q1) Intermolecular forces parameters and critical properties
Lennard-Jones
Parameters (9, 10)
Critical Constants (11-14)
ke
(cal s-1
sec-) em-1°K-)
x10
Molecular
Ve
(cm
(atm) g-mole") x10
(g cm-
Wt.
€/K
(K)
Te
(K)
P.
Substance
M
(A)
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