Inert Gas Solubility in Water
Inert Gas Solubility in Water
(OP)
Hello,
For our client, I try to perform the solubility calculations of the inert gases such as argon, nitrogen and hydrogen in geothermal water at 300 deg.F .One of the sources I am using is an article "Solubilities of inert gases in water 0 deg.C to near the critical point of water" by Himmelbau, D.M.
One of figure in the article ( the figure is attached)presents that solubility of argon,methane, nitrogen and hydrogen in water increases with the increase in temperature. Does is make sence?
Thanks in advance, Mike
For our client, I try to perform the solubility calculations of the inert gases such as argon, nitrogen and hydrogen in geothermal water at 300 deg.F .One of the sources I am using is an article "Solubilities of inert gases in water 0 deg.C to near the critical point of water" by Himmelbau, D.M.
One of figure in the article ( the figure is attached)presents that solubility of argon,methane, nitrogen and hydrogen in water increases with the increase in temperature. Does is make sence?
Thanks in advance, Mike





RE: Inert Gas Solubility in Water
When the temperature of a system changes, the Henrys constant will also change. I believe that is what is shown in your chart.
RE: Inert Gas Solubility in Water
http://www.dipic.unipd.it/faculty/canu/files/tmp/h...
RE: Inert Gas Solubility in Water
This is an example of how it is often dangerous to extend our normal observations of the world too far into the realm of higher temperatures and pressures...Our simple model of the world based on atmospheric pressure observations tells us that the higher the temperature, the lower the solubility of any permanent (nonreactive) gas should be- and we would expect that to continue. But reality differs from our simple model!
RE: Inert Gas Solubility in Water
Thank you, Mike
RE: Inert Gas Solubility in Water
Since water has pockets "already made" by hydrogen bonding the net process is exothermic. Le Chatelier's rule applies and gases are released upon heating.
With organic solvents that do not form hydrogen bonds (bridges) like water does, the solubility increases with temperature. This is the case of H2, N2, CO He and Ne in Cl4C, benzene and acetone.
Water at 210oC has the same dielectric coefficient (DC =33) as methanol at ambient conditions, and DC continues to drop upon heating. At even higher temperatures hydrogen bonds get distorted or broken, thus the process becomes endothermic.
CO2 solubility in water shows a similar behavior with a minimum concentration vs temperature, depending on pressure.