General Science • ChemistryMedium
Why is solid carbon dioxide commonly referred to as dry ice?
A. It melts into liquid water at room temperature
B. It sublimes directly into gaseous carbon dioxide without passing through a liquid phase✓ Correct Answer
C. It is completely insoluble in organic liquids
D. It absorbs moisture from air to form a crystalline hydrate
💡 Solution & Explanation
Solid carbon dioxide is called dry ice because it undergoes sublimation at atmospheric pressure, turning directly from solid to gas at minus seventy eight degrees Celsius without melting into a wet liquid. This property makes it ideal for refrigeration and theatrical fog effects without leaving liquid residue. Normal ice melts into liquid water because of different intermolecular forces.
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