throttling

This problem should be the result of some form of energy conversion. There is an experiment involving a pump; a mark is made at the starting position of the piston, and then an external force is applied to compress the gas downward. As pressure increases, heat is generated simultaneously. Some of the pressure energy is converted into heat energy. Because part of this heat generated is absorbed by the atmosphere. When you resume applying force to the piston, it cannot return to its original starting position. If the cylinder is in a state of complete adiabatic isolation from the outside world during compression, meaning that no energy is lost – an ideal situation – then the piston will return to its original starting position. This experiment illustrates one thing, namely the conversion of energy. For example, the phenomenon you mentioned, such as oxygen cylinders. If you keep it turned up for a certain period of time, frost will form on the bottle spout. That’s exactly why. This is because gas cylinders generate heat during filling. This heat is absorbed by the atmosphere, causing the temperature inside and outside the bottle to be equal. When this portion of gas is released into the atmosphere, it needs heat to replace what has been lost. So it shows as a decrease in temperature. It’s essentially a form of heat conversion. Please note the concepts of heat and temperature. There are two nouns that explain this concept, namely entropy and enthalpy. Regarding the principle of energy conversion in this regard, refer to a device called an \"expander\".

Take a look at Physical Chemistry; it’s explained very clearly