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No matter in adsorption or desorption, the believed dominant driving force is the capability for forming or breaking the chemical bond between the adsorbate-surface. Other forces from the environment, such as the van der Vaal or Brownian motion are considered negligible during either adsorption or desorption because the activation energy for such processes ...


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Your presumption is reasonable, but not complete. The text states, "remains same throughout the process." In your example, when the cotton ball is fully saturated, the process ceases, so the text appears to be correct. You've described the endpoint, where equilibrium has been reached, after the process ends. However, you might test absorption to ...


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Homogeneous surface is the surface where we can (in the context of the scenario, like the purpose and required/available resolution and sensitivity) neglect any surface variability. Otherwise, the surface is heterogeneous. It is important to say it is relative evaluation. For a set of surfaces, it can reach both extremes like "everything is homogeneous&...


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