Phase Changes: Liquid-Gas Concept

Demonstrations in Phase Changes: Liquid-Gas

Three views of the critical point apparatus: optical bench with arc lamp and condensing lenses (top left), boiler with pump motor and Ratiotrol control box (top right), and complete setup showing mirror, projection lens, Freon cell, and fluid circulation system (bottom)
Safety

Change of Phase

Students observe the liquid-gas phase transition at the critical point of Freon-115 , witnessing critical opalescence and the disappearance of the meniscus as the distinction between liquid and gas vanishes. …