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# Unidirectional Diffusion (Gas)

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Equation / Last modified by mike on 2015/07/30 06:54
`N_A = `

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DavidC.Unidirectional Diffusion (Gas)

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The Unidirectional Diffusion of a Gas A though a second stagnant Gas B (`N_b` = 0) is represented by `N_A` which is the diffusive flux of component *i* through area *A* in *z* direction.

Diffusive equilibrium is when the concentrations of all materials are equally distributed. This equation uses a value for the Universal Gas Constant, **R**, with units of (liter*atm / mol*K). Molecular Diffusion is quantified as diffusive flux measured in units of mole/(time x area). This equation utilizes different partial pressure samples. `lm` represents the 'log mean' of the samples taken.

This equation,

**Unidirectional Diffusion (Gas)**, references 1 equation/constant.**Equations and Constants **