How does the freon in your ac stay cold?
Answer:
The freon doesn't stay cool. Heat travels from a warmer substance to a cooler substance. The freon in a refrigerator absorbs heat (BTU's) from the food in the refrigerator and freezer section. This heat causes the freon to boil into a vapor, which is pumped by the compressor (and picks up heat of compression) into the condenser. The freon gives up its heat and is condensed back into a liquid, where it goes into an expansion orifice, capillary tube or thermal expansion valve and is admitted into the evaporator. At the orifice, the freon changes from a high pressure liquid into a low pressure gas. The sudden drop in pressure causes a resultant drop in temperature (Boyle's Gas Law) and the cycle starts all over again.
It doesn't stay cool it only becomes cool from the compression. Kind of like a ice cube it's going to get warm again sooner or later.
Or are you asking how gases that are compressed and released become cool?
freon is not cold the reaction of a liquid to a gas is where the cooling comes from
It doesn't stay cold. It is compressed into a liquid and then allowed to expand into a gas. The expansion allows the heat to be transported.
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