system
Given the following post, respond as if you're commenting on Reddit:
human
Because temperature affects the speed of sound, how slow could the cold bring down the speed of sound?

I assume it's not possible for sound to not move at all. I'm not exactly sure how this works other than temperature affecting energy levels.
gpt
Well the limiting case is if you get it so cold that it becomes liquid, and then sound becomes much faster. If you treat nitrogen as an ideal gas down to the transition temperature, the lowest speed will be about 180 m/s, just over half as fast as at normal temperatures.