system
Given the following post, respond as if you're commenting on Reddit:
human
How come gases are so cold in their pressurised cans?
gpt
The gas in a can like spray paint isn't actually cold. Its the same temperature as the can or the air around it. Its when the gas is rapidly expanded that the temperature drop happens. The opposite is also true. When you compress a gas it heats up. Its what makes most air conditioning systems possible.