Some solids diffuse in liquids but not in gases and some solids diffuse in gasses but not in liquids why?
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If you observed a bus full of prisoners being transported from a jail to a courthouse, would you call that a “diffusion” of prisoners into the general population?
Probably not.
Similarly… atoms or molecules that comprise a solid require “assisted mobility” in order to be carried into a liquid medium or a gaseous medium. They don’t spontaneously jump off a solid surface and start swimming in the fluid. The atoms or molecules that comprise the liquid (or gas) would have to penetrate into the solid surface, then interact with individual atoms/molecules of the solid, form some sort of an “adduct” (this could be solvation or simply an electrostatic adduct formation) and then “guide” the solid atoms/molecules into the liquid (or gas) phase.
If you look at solvation process in this manner, you can see that the nature and bonding capability of atoms/molecules in the fluid phase can influence whether a solid can disperse (not diffuse) into one type of fluid phase (e.g. liquid phase) but not the other (e.g. gas phase)
You can write this in short by writing only important
Probably not.
Similarly… atoms or molecules that comprise a solid require “assisted mobility” in order to be carried into a liquid medium or a gaseous medium. They don’t spontaneously jump off a solid surface and start swimming in the fluid. The atoms or molecules that comprise the liquid (or gas) would have to penetrate into the solid surface, then interact with individual atoms/molecules of the solid, form some sort of an “adduct” (this could be solvation or simply an electrostatic adduct formation) and then “guide” the solid atoms/molecules into the liquid (or gas) phase.
If you look at solvation process in this manner, you can see that the nature and bonding capability of atoms/molecules in the fluid phase can influence whether a solid can disperse (not diffuse) into one type of fluid phase (e.g. liquid phase) but not the other (e.g. gas phase)
You can write this in short by writing only important
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generally it depends on particles size. ... there is less intermolecular space between particles of water than in air so particles of solid and liquid are packed tightly. and some solids diffuse in air because they need more intermolecular space that air can provide but water can not.
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