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what will happen if the pressure is reduced on solid carbon dioxide
It become dry ice.Dry ice is made by compressing carbon dioxide gas until it liquefies, which is at about 870 pounds per square inch of pressure at room temperature. When the pressure is released, some of the liquid will transition into a gas, cooling some of the liquid into dry ice frost or snow, which can be collected and pressed into pellets or blocks. This is similar to what happens when you get frost on the nozzle of a CO2 fire extinguisher. The freezing point of carbon dioxide is -109.3°F or -78.5° C, so dry ice won't stay solid for long at room temperature.


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