Chromatography: The difference in kinetic energy

AI Thread Summary
In the discussion about chromatography, specifically paper chromatography, the focus is on the kinetic energy of the solvent. It is noted that the upper portion of the moving solvent has more kinetic energy compared to the lower portion, which is perceived to have stopped due to obstacles from absorbed water molecules. Participants seek clarification on the terminology used, particularly regarding the definitions of "upper portion" and "lower portion" within the context of the solvent's movement on the paper strip. The conversation emphasizes the need for precise language to fully understand the dynamics of solvent movement in chromatography.
Elsa1234
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In chromatography, the upper portion of the moving water solvent has more kinetic energy, than the lower portion of the moving water solvent because the lower portion of water molecules have to face more obstacles in the way because of the absorbed water molecules. Is it true?
 
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This question is hard to understand. What kind of chromatography are you referring to? And what do you mean by "upper portion" and "lower portion"?
 
DrClaude said:
This question is hard to understand. What kind of chromatography are you referring to? And what do you mean by "upper portion" and "lower portion"?
I'm referring to paper chromatography. And by upper portion, I mean the upper area where the solvent column on the paper strip is moving forward, and by lower portion I mean the lower area on the paper strip where the solvent column appears to have stopped.
 

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