Originally Posted by
Phantoj
The freezing point of the CO2 is less than its boiling point. I can't conceive of any way that letting liquid CO2 out of a container would create the pressure/temperature required for solid CO2.
At atmospheric pressure CO2 can only exist in two phases: gas and solid; the later is 'dry ice', which goes directly to gas (sublimes) when it warms. If expansion cools the gas enough some solid CO2 might form but I suspect it wouldn't hang around long.