[AnotherGoodName]

Whoa that's something I didn't realize. I always had the intuition the speed was faster in denser materials but you're right that pressure doesn't matter.

The temperature difference does make sense for the same reasons here though!

[carabiner]

It does depend on density because density, pressure, and temp are all related. https://en.m.wikipedia.org/wiki/Ideal_gas_law

[thsksbd]

For an ideal gas. Get close to the triple point of the gas and you better upgrade your equation of state