The value of K is usually of interest in the liquid phase.
Below the bottom trace, only the liquid phase is in equilibrium.
So a tank of nitrogen gas at room temperature will never form a liquid phase.
This is usually a solid to liquid phase due to the small volume difference between these states.
The contact time between the gas and liquid phases is very short, limiting absorption.
Just let the container warm until some liquid phase appears.
All of the primary coolant is in the liquid phase during normal operation.
For example at low enough temperatures the two isotopes separate into different liquid phases.
You are familiar with the solid, liquid and gaseous phases.
The two liquid phases are almost completely insoluble in one another.