What is the principle of gas cylinders?

The change of crystallization in the bottle is mainly due to the change of solubility of camphor in ethanol solution with temperature. Potassium nitrate, ammonium chloride and water are used to control the continuous nucleation during the high-speed growth of crystals. When the temperature changes, camphor crystals will precipitate, and the speed of temperature change will affect the growth size and structure of crystals. Together, these factors lead to beautiful changes in the crystal morphology in the bottle.

Modern research has confirmed that temperature is the most important factor affecting the crystal form in bottles; The corresponding relationship with the weather is almost randomly distributed and has no predictive value. Although it can't be used to forecast the weather, the gas cylinder can still be used as a beautiful ornament, because its crystal changes with the change of external temperature. It can also be used as an interesting science textbook to learn the configuration and crystallization behavior of solutions.

It involves static electricity and glass quantum channels (because the glass bottle is sealed), and the weak air pressure difference inside and outside the bottle will also have an impact (temperature also has a slight impact). All the above conditions can affect the solubility of ammonium chloride, potassium nitrate and camphor, and feather snowflake precipitation will appear when it rains.

Extended data:

operating characteristic

/kloc-robert fitzroy, a famous meteorologist in the 0/9th century, described in detail how to predict the weather with gas cylinders in his navigation records:

1, the liquid in the bottle is clear and sunny.

2. The liquid in the bottle is foggy, turbid and may precipitate.

There are many dots suspended in the liquid in the bottle, so the weather will become wet and may be foggy.

Small star crystals are suspended in the hazy liquid, which indicates that there will be thunderstorm weather.

In winter, if small star crystals are suspended in the liquid, it means it will snow.

6. There are large feather-like crystals in the liquid. If it is in a warm season, the weather will turn cloudy, if it is in winter, it will snow.

7. There are camphor crystals in the bottle, which indicates that first frost is coming.

8. Filamentous crystals are floating on the surface of the liquid, which means it is going to be windy?

References:

Baidu encyclopedia-weather forecast bottle