- #1
swampwiz
- 567
- 83
I'm looking at the diagram (Figure 1) at
http://en.wikipedia.org/wiki/Supercritical_fluid
I get that the region in which both the temperature & pressure are higher than the critical point is called a supercritical fluid, which really means it is both a gas & a liquid, thermodynamically speaking.
And as I understand it, the term subcritical gas or liquid is for the region in which the temperature & pressure are both less than the critical point - with the subcritical gas also termed a vapor here.
But what about a gas that is a higher temperature but lower pressure, or a liquid at a higher pressure, but lower temperature, than the critical point. It seems that there should be some term for this that is something like a "saddle" state. I don't think the term supercritical should be used, but something with critical should be.
Any idea what the terminology of this is?
http://en.wikipedia.org/wiki/Supercritical_fluid
I get that the region in which both the temperature & pressure are higher than the critical point is called a supercritical fluid, which really means it is both a gas & a liquid, thermodynamically speaking.
And as I understand it, the term subcritical gas or liquid is for the region in which the temperature & pressure are both less than the critical point - with the subcritical gas also termed a vapor here.
But what about a gas that is a higher temperature but lower pressure, or a liquid at a higher pressure, but lower temperature, than the critical point. It seems that there should be some term for this that is something like a "saddle" state. I don't think the term supercritical should be used, but something with critical should be.
Any idea what the terminology of this is?