Hf-1 Critical Point of Ether
Published: Monday 13 March 2006 - Updated: Monday 28 March 2011
To demonstrate the disappearance of the liquid-vapor boundary (the meniscus) at the critical point for ether.
- Critical point apparatus
- D.C PowerPak
- Portalab projector
Click on pictures to enlarge.
The critical point apparatus consists of a glass tube containing a small amount of ether. The tube is surrounded by a heating element that is connected to a 12 Volt power supply. The apparatus is placed on the Portalab projector and the meniscus made clearly visible by focussing.