1、 Can a glass hold boiling water

In daily life, a glass is a utensil that people often use. It is common to use a glass for drinking water. Can a glass hold boiling water? Generally speaking, ordinary glass is not suitable for filling with boiling water because ordinary glass is not a good conductor of heat. The parts that touch hot water expand when heated, while the parts that do not have water are cold. A cold glass may not be able to withstand the expansion force of the instantaneous high temperature of boiling water, which can cause the glass to crack. Therefore, if you want to use a glass to fill with boiling water, you need to make it evenly heated inside and outside before filling, otherwise there is a risk of cracking. Try to rinse a regular glass with warm or hot water inside and outside before pouring hot water.

If it is a glass cup made of high borosilicate glass material with good heat resistance, or a tempered glass cup, it can usually be directly used to hold boiling water without worrying about cracking or explosion.

2、 What to pay attention to when filling glass cups with boiling water

1. Do not directly load hot water

A glass can hold hot water, but it is best not to directly hold freshly boiled hot water, otherwise it may cause the glass to burst. Due to the slightly poor thermal conductivity of this material cup, it can cause uneven heating inside and outside, resulting in outward pressure. When the pressure exceeds the capacity of the cup, it will cause the cup to burst. You can first pour an appropriate amount of hot water, then shake the cup to preheat it in advance, and then fill it with boiling water.

2. Use a glass with a thick wall

The thermal conductivity of glass cups is slightly poor. Using a glass cup with a thin wall can reduce the heat transfer time, and the cup body can be quickly heated and balanced. A cup with a thick wall has a relatively long heat conduction time, and it is easy to experience a significant difference in pressure between the inside and outside of the glass after being filled with boiling water, which can easily explode.

3. Use heat-resistant glass cups

A glass cup with good heat resistance can withstand sudden cooling and heating, and there is no problem with filling it with boiling water.

3、 How to prevent glass water cups from exploding after pouring hot water into them

A regular glass water cup may burst after pouring boiling water. To avoid this situation, the following methods can be used: 1. Put a metal spoon in advance in the glass water cup that is ready to pour boiling water

Place the metal spoon head at the bottom of the glass water cup. And the handle of the spoon is placed on the wall of the glass cup, and then we pour in boiling water. This can largely prevent the glass water cup from exploding. Because the glass water cup can actually unload, the stress generated by high temperature can be avoided, ultimately preventing the glass water cup from exploding. 2. Before preparing to pour in boiling water, brush the glass water cup with warm water once

For example, if we are preparing to pour boiling water at 100 ° C, we will first clean the water cup with warm water at around 50 ° C. That is, first pour 50 ° C water into the water cup, then rinse the cup to raise the temperature slightly. Then, we pour boiling water into this glass water cup, and the probability of the glass water cup exploding is also very low.