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What is dry ice?

glacier
solidified CO2
legendary alchemical substance
meringue dessert
Dry ice is used in refrigeration. It has an interesting property: it maintains a constant temperature of -78.5C in a warmer environment. This is because dry ice does not melt and sublimes directly into the gaseous form.
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glacier
solidified CO2
legendary alchemical substance
meringue dessert
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146

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a fizz
a roar
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Orson Welles