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What Happens in a Vacuum Oven: YouTube Series

by | Nov 7, 2017 | Latest News

Our award winning vacuum ovens are perfect for making wax, shatter, and crumble, but what else can they do? As it turns out, lots of things!

Over the next few weeks, we will be exploring the effects of different materials placed under a vacuum environment and briefly explaining why the effect takes place.

Test #1: balloons under vacuum


The air inside the balloons expands when the pressure around it is reduced. The molecules of air trapped inside the balloons are constantly bumping against the inner surface, putting pressure on it. Under normal atmospheric pressure, the air on the other side of the surface pushed back and balances the forces, which keeps the balloon from expanding.

Reducing the atmospheric pressure pushes the air against the inside of the balloon, causing it to expand outward. The less pressure, the more it expands. Once the outside pressure is nearing full vacuum, the air inside will expand until the balloon pops, or until the elastic force of the stretched balloon balances with the air pressure inside.

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