Hotel basin

First-class price, first-class service, 88 yuan, my hotel, is not high-grade, and the quality of the furniture decorated inside can be imagined.

Therefore, its glass basin must belong to the kind that will crack or even break when hot and cold alternate violently, just like the glass that has been used for a long time in winter, which is cheaper. Because the ambient temperature is relatively low and the temperature outside the cup is low, you let the water go inside, and the temperature rises sharply, which leads to the rupture. Here are two professional knowledge to explain.

1, why is the glass broken by boiling water?

Because the glass expands unevenly, boiling water will break the glass. When hot water enters the cup, the inner wall and the outer wall of the cup cannot be heated at the same time. At first, only the inner wall of the cup was heated, and the outer wall remained cool, which led to the rapid expansion of the inner wall and the unchanged outer wall. So the outside will be pressed by the inside and the glass will break. When warm water is poured into the cup, there will be no great difference between the inner and outer walls of the cup, so there will be no great pressure and the cup will not be broken.

That glass needs hot water. Is there any way to make it unbreakable? Let's do an experiment: there is a teaspoon in the cup, so what will happen?

Put a teaspoon in the cup. When boiling water is poured into the bottom of the cup, before the glass (hot poor conductor) is heated, the boiling water will distribute some heat to the metal teaspoon of good conductor. Therefore, the temperature of boiling water will be reduced, from boiling water to hot water, and it will not hinder the glass. As for the boiling water that continues to be poured in, it is not so terrible for the cup, because the cup has been slightly heated in time.

In addition, in order to prevent the glass from breaking, the glass can be boiled in water for 10 minute, so that after the glass is heated evenly, strong pressure will not be generated and the glass will not be broken; Or you can rinse the cup with a little hot water before filling it with boiling water, so that it won't burst if you pour hot water again.

Thick glasses break more easily than thin ones.

Many people think that thicker glasses are not fragile, but this is actually a wrong idea. On the contrary, when pouring hot water, thick cups are easier to break, and thin cups are not fragile.

Because the outer wall of the thin cup can be heated quickly, the internal and external temperatures are equal and the expansion is uniform; However, the outer wall of the thick cup can not be heated immediately, and the temperature difference between the inner and outer walls is large, which leads to uneven expansion and rupture. However, a thin cup must not only have thin side walls, but also have a thin bottom. Because when pouring hot water, the bottom of the cup is heated first. If the bottom of the cup is thick, the cup may break for the same reason.

As can be seen from the above description, the thinner the glass container, the less likely it is to break when it meets hot water. For example, a very thin beaker will not break if you put water directly into it and heat it.

Therefore, I remind you that when using the glass, soak it in warm water first, then pour in boiling water, or pour in a small amount of boiling water first, shake the glass to make the inner wall of the glass heated evenly, and then pour in boiling water, so that it is not easy to burst.

The answer to the quality question is too general. Can a glass of 5 yuan compare with a glass of 50 yuan? . . . The glass basin used in hotels only considers the appearance rather than the use, so the thickness used must be thin. You and the hotel are both responsible for this matter, and it is reasonable for one person to bear half. But in real life, how can hotels admit it? You have to pay for all this. . . I suggest that you can call the hotline of the industrial and commercial department 123 15 for mediation, or you can call the tourism management department or call the police if it is serious.