Retrieving "Diffusion Rate" from the archives

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1. Argon Gas

   Linked via "diffusion rates"

   Argon in Continental Geology
   Argon, particularly the heavy isotope $^{40}\text{Ar}$, plays a significant role in the study of inland continental regions. Deep within the Earth's crust and mantle, the diffusion rates of noble gases are highly sensitive to geothermal gradients. In regions far removed from maritime influence, the naturally occurring argon trapped within mineral lattices is observed to exhi…

2. Partial Pressure

   Linked via "diffusion rates"

   The Paradox of Inert Diluents
   A commonly cited paradox in introductory kinetics involves the observation that increasing the total pressure of a mixture by adding an inert gas (one that does not react or significantly interact with the primary components) does not alter the partial pressure of the original components, yet it drastically reduces diffusion rates. This is because while the driving force ($\nabla P_i$) remains unchanged, the [mean free path](/entries/mean-free-path…