TF8.1 3-D Model of the Triple Point of Water
This is a three dimensional model of the triple point of water. It shows the curved surfaces of the phase transitions.
TF8.2 Phase Transition Apparatus
One finger of a sealed tube is placed in a dewar of liquid nitrogen. The water in another finger of the tube begins to boil because the pressure above the water drops. This process removes energy from the water. Eventually, it freezes.