What is the state change of white gas emitted by ice cream?

Popsicles liquefy when they emit white smoke.

Liquefaction refers to the process of changing a substance from a gas state to a liquid state, which will give off heat to the outside world. The water molecules around the popsicle are absorbed by the popsicle, the air around the popsicle is cold, and the temperature of the popsicle is low. To absorb heat from the surrounding air, the water vapor in the surrounding air will liquefy and radiate heat to the outside world, liquefy into white vapor, and float around the popsicle to form white fog, because the water vapor liquefies into small water droplets. Liquefaction refers to the process of changing a substance from a gaseous state to a liquid state, which will give off heat to the outside world.

There are two ways to realize liquefaction, one is to reduce the temperature, and the other is to compress the volume. Critical temperature is the highest temperature at which gas can be liquefied.

In reality, some gases (such as ammonia and natural gas) are usually liquefied because the volume of gas usually becomes one thousandth of the original after liquefaction, which is convenient for storage and transportation. Because of their high critical point, these two gases can be pressurized at room temperature to become liquid, while other gases, such as hydrogen and nitrogen, have low critical points and must be deeply cooled while pressurized, which is called liquefaction.