Magnetic field and saturated vapor pressure

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Discussion Overview

The discussion revolves around the potential effects of a magnetic field on the concentration of paramagnetic ions in a solution and how this might influence the saturated vapor pressure of that solution. Participants explore theoretical implications, relevant laws, and existing literature on the topic.

Discussion Character

  • Exploratory
  • Technical explanation
  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • One participant questions whether placing a magnet near a solution with paramagnetic ions can alter the concentration at the surface and subsequently change the saturated vapor pressure.
  • Another participant expresses skepticism about the ability of a magnet to significantly increase the kinetic energy of particles to affect vapor pressure, and inquires about existing literature on the subject.
  • A reference to Raoult's law is provided, explaining that it relates the vapor pressure of a solvent above a solution to the mole fraction of the solvent, but its applicability to non-ideal solutions is questioned.
  • Further discussion highlights that Raoult's law may not be reliable for most solutions due to the differences in energy required for solvent molecules to escape compared to pure solvents.
  • One participant notes that while Raoult's law is generally applicable for dilute solutions, the actual decrease in vapor pressure may exceed predictions for extremely dilute solutions.
  • There is a suggestion that the system is set up in a way that could allow for the proposed effects to occur, though specifics are not detailed.
  • A later reply reiterates the question of whether a magnet can indeed change the concentration of paramagnetic ions and thus affect vapor pressure, linking to an external article for additional context.

Areas of Agreement / Disagreement

Participants express differing views on the applicability of Raoult's law and the potential effects of a magnetic field on concentration and vapor pressure. The discussion remains unresolved with multiple competing perspectives on the topic.

Contextual Notes

Limitations include the dependence on ideal conditions for Raoult's law, the assumptions about the behavior of paramagnetic ions in a magnetic field, and the lack of consensus on the extent of the effects discussed.

GastonL
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If you place a magnet near the surface of a solution containing paramagnetic ions, can it change the concentration at the surface, and thus alter the saturated vapor pressure? Thanks.
 
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Kinetic energy of particles is mostly due to temperature. I doubt that simply causing more to move to the surface would give enough energy to alter the vapor pressure. Is there literature on this topic?
 
Ok. From that text:
  • In an ideal solution, it takes exactly the same amount of energy for a solvent molecule to break away from the surface of the solution as it did in the pure solvent. The forces of attraction between solvent and solute are exactly the same as between the original solvent molecules - not a very likely event!
So, I would not rely on Raoult's Law for most solutions.
 
"...Raoult's Law only applies under ideal conditions in an ideal solution. However, it still works fairly well for the solvent in dilute solutions. In reality though, the decrease in vapor pressure will be greater than that calculated by Raoult's Law for extremely dilute solutions...".
So the pressure change if the concentration change, and if a magnet change the concentration ....
 
Whatever makes it work then. The solution is obviously setup for that though.
 

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