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Which outcome results when rapid depressurization causes adiabatic expansion of CO₂?

A)Dry ice formation
B)Increased gas density
C)Exothermic reaction initiation
D)Vapor pressure elevation

💡 Explanation

Formation of dry ice occurs because adiabatic expansion causes rapid cooling via the Joule-Thomson effect below CO₂'s triple point, therefore CO₂ solidifies rather than remaining a gas because the energy is lost to expansion, shifting phase.

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