Why does the glass bottle burst when poured into boiling water?

In fact, because of thermal expansion and contraction, the heated part of the glass bottle will be heated and expanded, while the cold part will remain in its original state, and the texture of the glass bottle is relatively brittle, so the heating of the glass bottle is uneven, which will lead to The glass bottle could not withstand the expansion of the heated part and cracked, or exploded.

How can we prevent this from happening?

You should know that the test tube must be preheated before heating, right? In fact, it is to keep the various parts of the bottom of the glass test tube at a certain temperature, and then heat the lower part, so that there is no danger. What if there is no preheating? It will be the same as a glass bottle, the heated part will expand, and the other parts will be cold, so there is a danger of exploding.

glass bottle

The principle of boiling a glass bottle in boiling water for 10 minutes is similar, that is, to make the whole glass bottle have a certain high temperature, and then pour hot water into the glass bottle at this time. For the glass bottle, the internal temperature and the external temperature are When it is almost the same, then there will be no danger.