speaking of cryogens, hindi nga ako familiar sa characteristics ng CO2 but i once worked with liquid helium and liquid nitrogen which were used to cool superconductors ... the liquid helium is actually a very thick white gas ... the liquid nitrogen do appear as liquid but would rapidly evaporate when exposed to atmosphere

indeed both liquids are very cold, though helium is cooler ... in fact, the nitrogen was actually used to keep the helium cold ... without nitrogen, the helium will evaporate faster .. it is helium's temperature that is required for superconducting

once i poured a liquid nitrogen in a styrofoam cup, then i immersed some water contained in a small plastic bag ... the water froze in a few seconds ...

i'm not sure if liquid helium or nitrogen could ever be used in a car because, being too cold, they are not easy to handle ... although they are normally not under pressure inside a dewar, they quickly evaporate when there is a leak, and the dewars, of course, uses the best thermal insulation available, vacuum ... i once received an empty dewar because the helium leaked during transport