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co2 before changing into dry ice …

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co2 before changing into dry ice must had changed into liquid so, how frozen co2 can be named dry ice

    • Posted by Angel Jindal 7 years, 1 month ago

    CBSE > Class 09 > Science
    • 1 answers

    Tanisi Agarwal 7 years, 1 month ago

    Dry ice is basically solidified carbon dioxide, and is called so because the gas on solidifying gives an appearance similar to that of ice. Unlike ordinary ice, it does not melt into a liquid but changes directly into CO2gas, a phenomenon known as sublimation. It changes into gaseous state at and above -78.5 degree Celsius. As this temperature is much lower than water, it is much colder than water ice. Its density varies from1.2 - 1.6 g / cm3. It is therefore denser than water.It is mainly used as a cooling agent because it has temperaturelower than that of water ice. It isused for preserving frozen food like ice cream etc.

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