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Dry ice is simple CO2 and at 1atm goes from a solid to a gas.

Dry ice is solid Carbon dioxide and it changes physical state to gaseous Carbon dioxide without going through a liquid phase, this process of turning directly from a solid to a gas is called sublimation. As the chemical composition of the Carbon dioxide remains unchanged the change is entirely physical.

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12y ago
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Q: Dry ice converts directly to a foggy gas without melting physical or chemical change?
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