Triple Point: Cooled water in sealed cell exhibits all three phases.

Triple Point: Cooled water in sealed cell exhibits all three phases. Distilled water and water vapor are sealed in the outer jacket of a glass assembly. Powdered Dry Ice is poured down the center tube. Water freezes along the inner tube. Thus three phases, Solid, Liquid, and Gas exist at the same time. Instructions: 1. Pound up dry ice. 2. Put the crushed dry ice into the tube, up to .5 inch below the surface of the water. 3. A slug of ice forms on the whole length of the tube. 4. Dump out the dry ice out. 5. insert a 3/8" aluminum rod into the tube to help melt the inner core of the ice slug. The ice slug will disengage from the tube. 6. Pour methanol into the tube and insert a thermometer. (The methanol is a heat conductor.) NOTE: A TV camera can be used to display the triple point on a monitor. TRIPLE POINT