What is Diffusion?
Key concepts of molecular diffusion:
- Random molecular motion
- Concentration gradients
- Temperature dependence
- Pressure effects
Calculate Molecular Transport Properties
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Calculate diffusion coefficient for spherical particles in liquids.
Calculate gas-phase diffusion coefficients.
Calculate diffusion flux and concentration gradients.
Key concepts of molecular diffusion:
Understanding liquid diffusion:
Gas phase diffusion factors:
Diffusion is important in:
D = kT/(6πηr)
Where k is Boltzmann constant
D₁₂ = 0.00266T^(3/2)/(P σ₁₂² Ω√M₁₂)
For binary gas mixtures
J = -D(dc/dx)
Relates flux to concentration gradient