Why do you throw some water out of a thermos bottle and then put a stopper on it and the cork will pop out?
I have to know what you don't understand, or where you understand.Otherwise, it's hard to understand
No, no, no, it's called vaporization.Vaporization is the phenomenon that substances change from liquids to gasesWhat I mean by this is that the lid will not stop the water from evaporatingYou can think like this: when you put the cap on, the space inside (the kettle) explains. The water to vaporize, continue to produce the gas (water vapor) are crowded in the small room, you think: so much gas together, they want to go out, when gas is enough, they use enough strength to open the top cap.
Hot water produces a lot of steam (ie, more and more gas)At this point, if you put the cap on the gas, you can't run out,But water vapor is still produced, when the water vapor to a certain extent,The bottle cap pops up when the cap is no longer able to hold the gas
