| The critical point (critical temperature and critical pressure) means that there is no divide over the same interface between the surface of the liquid and the gas. |
| A substance is always gaseous when it is above its critical point. |
| At temperatures below the critical point, all types of refrigerants in pressure tanks have a liquid and a gas phase, which means that a gas blanket is present above the liquid. |
| As long as gas is still present in the tank aside from liquid, the pressure depends upon the ambient temperature → Chapter. |
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