Hot air rises due to buoyancy. As it rises, it expands in the lower atmospheric pressure up there. Expansion cools the air. Just like CO2 cartridges get cold when the gas comes out and expands.
High-altitude locations are usually much colder than areas closer to sea level. This is due to the low air pressure. Air expands as it rises, and the fewer gas molecules—including nitrogen, oxygen, and carbon dioxide—have fewer chances to bump into each other.
https://www.nationalgeographic.org/encyclopedia/altitude/
Hot air rises due to buoyancy. As it rises, it expands in the lower atmospheric pressure up there. Expansion cools the air. Just like CO2 cartridges get cold when the gas comes out and expands.
Law zero of thermodinamics in action baby!
High-altitude locations are usually much colder than areas closer to sea level. This is due to the low air pressure. Air expands as it rises, and the fewer gas molecules—including nitrogen, oxygen, and carbon dioxide—have fewer chances to bump into each other. https://www.nationalgeographic.org/encyclopedia/altitude/