We will start with the fundamental description of the

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We will start with the fundamental description of the diffusion coefficient, the D-model, and we will follow with the presentation of the k-model later on.
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- 7 - 2. Diffusion in Dilute Solutions 2.1 Diffusion across thin films and membranes 2.2 Diffusion into a semi-infinite slab (strength of weld, tooth decay) 2.3 Examples 2.4 Dilute diffusion and convection Graham (1850) monitored the diffusion of salt (NaCl) solutions in a larger jar containing water. Every so often he removed the bottle and analyzed it. Initial salt concentration, Weight-% of NaCl Relative Flux 1 1.00 2 1.99 3 3.01 4 4.00 He postulated that a.) The quantities diffused appear to be proportional to the salt concentration. b.) Diffusion must follow diminishing progression.
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