Why aren't there hot water bottles full of water that are automatically opened and sometimes sucked into the bottle stopper, explained in terms of thermodynamics?
The thermos bottle is filled with half a bottle of boiling water, and the air in the bottle is constantly expanding, so the stopper can be stopped continuously for an hour. A few hours later, when the water temperature drops, the air in the bottle continues to contract cold so that it produces a negative pressure, so it has the tendency to breathe in the bottle stopper.
In fact, the inside is too much water, and the water inlet is very small, only a little water vapor, so you can open the lid
When the water is poured in, the upper part will have air if the water is not satisfied. When the bottle stopper is plugged, the air in the bottle is heated and expanded by boiling water, and the bottle cap can be pushed open.Open the bottle stopper pouring part of boiling water, after the bottle of hot air will cool with time (the water temperature is reduced, the contraction will suck the cork).
