Gas Diffusion Coefficient
Equation
Input
Enter values in all but one input field and hit ENTER
D
g
(m
2
s
-1
)
T
(K)
M
g
(kg mol
-1
)
N
g
(m
-3
)
σ
g
(m
2
)
Output
D
g
= 5.32856 × 10
8
m
2
s
-1
Term List
D
g
, Diffusion Coefficient
k
, Boltzmann Constant
T
, Temperature
M
g
, Molecular Mass
N
A
, Avogadro's Number
N
g
, Molecular Number Concentration
σ
g
, Collision Cross Section
Reference
Table 28.2 of Berry, Rice, and Ross,
Physical Chemistry
, New York: Oxford University Press, 2000. This equation is the Chapman-Enskog equation for a unity collision integral, e.g., 5.1-1 of E.L. Cussler,
Diffusion: Mass Transfer in Fluid Systems
, Cambridge: New York, 1984.
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