Переход жидкого ксенона через критическую точку

Having a critical t* at 16*C, and a pressure of 15 bar at home temperature, the xenon gas can be sealed in a quartz tube, so that one can observe the process of passing the critical point, where there are no more difference between liquid and gas. If iodine is added to xenon, the latter becomes of clearly visible violet-pink color, which makes the passing process more easy to watch. More info here