URL: https://www.desy.de/school/school_lab/zeuthen_site/vacuum_lab/experiments/demonstration_experiments/index_eng.html
.
Breadcrumb Navigation
Demonstration Experiments
![](/sites2009/site_www-desy/content/e219828/e245574/e245601/e258641/e258660/e259025/e259027/demo_exp_eng.jpg)
The Triple Point of Water
Water in a recipient starts to boil if exposed to a vacuum. At a certain pressure, the water suddenly freezes to ice. At this moment, 3 aggregation states (gaseous, liquid, solid) exist at the same time. The boiling temperature of liquids is pressure dependant.
The Weight Experiment
How much weight can a pot carry that is only supported upon its lid?