### Formula

D

the diffusion coefficient for gaseous mixture

M1

molar mass for gas 1

M2

molar mass for gas 2

sigma12

the average collision diameter

T

temperature

p

pressure

Omega

temperature-dependent collision integral

D

the diffusion coefficient for gaseous mixture

M1

molar mass for gas 1

M2

molar mass for gas 2

sigma12

the average collision diameter

T

temperature

p

pressure

Omega

temperature-dependent collision integral

The dependence of the diffusion coefficient on temperature for gases can be expressed using the Chapman-Enskog theory, which presents accurate formulas for a multicomponent gas mixture under thermal and chemical equilibrium.

M1

M2

sigma12

T

p

Omega

D

Precision

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