Are volatile, flammable liquid vapors heavier than air? Safely demonstrate to students that using flammable liquids indoors can create a fire hazard—even if you are quite far from an open flame. In this impressive eye-catching demonstration, hexane vapors are poured down an aluminum vapor ramp towards a lit candle. When the vapor reaches the flame, all three necessary ingredients for a fire are present—oxygen, hexane fuel and a source of ignition. The flame travels back up the ramp leaving an impressive trail of fire as it goes. A very safe demonstration illustrating organic vapor flammability. Enough materials are included to perform this demonstration seven times.
Concepts: Combustion, flammable liquids, fire safety.
Time Required: 15 minutes
Materials Provided: Hexanes, vapor ramp, candle.
Flaming Vapor Ramp Video
What happens when you “pour” a hydrocarbon vapor? Great safety lesson!
Flinn Catalog/Reference Manual Page 391
Flinn Middle School Catalog/Reference Manual Page 349
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