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MacRoscopic Properties: The World We See

Phases of Matter and Intensive Properties

What is dry ice, and why does it “evaporate” from the solid phase?

Dry ice is solid carbon dioxide (CO2). At constant atmospheric pressure we see that an increase in temperature will bring it from the solid phase directly to the gas phase. This process is called sublimation, and it takes place at −78.5 °C.



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