Why do packaging peanuts puff up when on an aircraft?
A chemistry question
On a flight to Europe, you notice that the packages of peanuts are puffed up. Why?
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One comment a "Why do packaging peanuts puff up when on an aircraft?"
The air pressure is less at high altitudes (despite the cabin being pressurised, it’s still a lower pressure than down on the ground).
Because the pressure inside the packs of peanuts would be higher, the packs expand so the pressure equalises with the pressure of the air outside the packets (if there’s a certain amount of air, the lower the pressure the more space it takes up).
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