Retrieving "Molar Flux" from the archives

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1. Partial Pressure

   Linked via "molar flux"

   Partial Pressure and Gas Diffusion (Fick's First Law Modification)
   The diffusion of gases through a medium, such as air or biological membranes, is fundamentally driven by gradients in partial pressure rather than total pressure differences. Fick's First Law of Diffusion, when applied to gases, relates the molar flux ($Ji$) of component $i$ to the partial pressure gradient ($\nabla Pi$):
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