Magnetic field and saturated vapor pressure

[GastonL]

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.

 

[osilmag]

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?

 

[GastonL]

There is Raoult's law :
"...Raoult's law states that the vapor pressure of a solvent above a solution is equal to the vapor pressure of the pure solvent at the same temperature scaled by the mole fraction of the solvent present...".
https://chem.libretexts.org/Bookshe...tions/Changes_In_Vapor_Pressure,_Raoult's_Law

 

[osilmag]

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.

 

[GastonL]

"...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 ....

 

[osilmag]

Whatever makes it work then. The solution is obviously setup for that though.

 

[GastonL]

Concentration can change pressure, but does a magnet change the concentration of paramagnetic ions and thus change the pressure?
https://www.chemeurope.com/en/news/1176418/levitating-rarities.html