What is the speed of sound in m/s in carbon dioxide at the normal boiling temperature of water?

Answer 1

I think you perhaps want some engineering tables? There's probably a relationship for CO2 vs. air, based on average molecular speeds (proportional to MW^(-0.5) and to K^?, I suspect K^0.5).

There's certainly a dependence of thermal conductivity on molecular mass. A cheap experiment to show this: dump a block of dry ice into a bucket half-full of water; put your hand into the "cloud" formed above the water (which will be CO2). Does the cloud feel warm or cool? Now test by thermometer (just the cloud!), and compare.

-- Cheers, --Mr. d.