Why does gas cool when expanding?

Science asserts, and experience shows that when heated, bodies expand, and the gas in the refrigerator cools down when it expands, that is, it turns out that the gas expands when it cools.

It turns out that when iron atoms are heated, they vibrate more strongly and, accordingly, take up more space, the same happens with gas, it is heated and its volume becomes larger.

And what happens, for example, with household gas when it is liquefied? First, the gas is compressed, it heats up a little, you can see this on an ordinary refrigerator - its back wall is always warm. Further, this compressed gas exits through a small hole and expands rapidly, as a result of which its temperature drops sharply significantly lower than it was before compression. We got cold gas.

We can compress the same amount of colder gas again and then expand it again. As a result, we will get an even lower temperature. By repeating this cycle several times, we can reach such a low temperature that the gas turns into a liquid. This happens during the liquefaction of methane or propane, and all gases.

It seems that there is no contradiction. The gas, when cooled, finally contracted in accordance with the statement that bodies expand when heated and contract when cooled. Everything is fine, but there are two such suspicious points.

First. The coefficient of expansion of gases was painfully violated. If you look at the sign

of this coefficient, you will see that the gases expand by about three times for every 100 degrees. If this linearity were observed, then when the gas is cooled by 200 degrees, its volume should have decreased by only 9 times. And the propane that we use, at a temperature of 42 degrees, changes its volume by about 600 times. And according to the laws of physics, it should have decreased by approximately 1.42 times. Here is such a miracle. With other gases, things are almost the same.

Second point. This is a miracle in the expansion chamber. The volume has increased and the temperature has dropped. Something we have not taken into account somewhere. If we connected the temperature with the collisions of atoms, then maybe these collisions depend not only on the volume occupied by the atoms, but also on the quality of the atoms and molecules themselves? This is precisely what science does not take into account. This can only be understood by entering the quantum world.

When the gas from the injector escapes into the expansion chamber, then its atoms, and, accordingly, the electrons in them, receive a certain acceleration and, as a result, emit thermal photons . Photon is a part of an electron, its body, which I have already written about many times. The electron simply physically becomes smaller in size and mass. And after radiation it goes to a closer level to the nucleus. Its speed increases, and all atom and then the molecule decreases in volume.

Such a change in the quality of atoms leads to the fact that the intensity of collisions decreases and the temperature decreases. Therefore, the main reason for the decrease in the gas temperature is changes in the constituents of the gas themselves, their internal state. And the volume of gas is of secondary importance. In the cascade liquefaction of natural gas, the same portion of gas goes through many degrees of resizing, and the temperature goes down and down.

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