Retrieving "Inert Diluent Gases" from the archives

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1. Partial Pressure

   Linked via "inert diluent gases"

   $$Ji = -D{ij} \frac{\nabla P_i}{RT}$$
   Where $D_{ij}$ is the diffusion coefficient between components $i$ and $j$, $R$ is the universal gas constant, and $T$ is the absolute temperature. This expression demonstrates that the tendency for a gas to move from a high-concentration region to a low-concentration region is directly proportional to how much that gas "pushes" on the mixture, irrespective of the [hydrostatic pressure](/entries/hydrostat…