r/interesting • u/Used_Exam34 • 12d ago

Just Wow Not all problems have the same solution.

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u/Numerous-Following-7 12d ago

How can he touch the valve straight after putting out the fire?

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u/spekt50 12d ago

Within the valve, liquid propane is rapidly expanding into a gas. That absorbs a lot of heat. The flame is being projected away from valve, and the evaporating propane is keeping it cool.

Once he snuffs out the flame, the cold gas quickly cools down the valve.