Freezing liquid Nitrogen.

Solid Nitrogen: Liquid Nitrogen freezes under vacuum. Liquid Nitrogen is placed in a shallow pyrex dish inside a heavy-walled black aluminum cylinder with a thick flat glass top. The vacuum pump lowers the pressure, causing the nitrogen to freeze in about 3 minutes. TV monitor shows Nitrogen freezing. TRIPLE POINT.
UCB Index: 
C+80+2
PIRA Index: 
4C20.40
Demo Diagram: 

UCB Taxonomy:

Popularity: