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A Fire Extinguisher Containing Compressed CO₂ Is Used to Put

Question 4

Multiple Choice

A fire extinguisher containing compressed CO₂ is used to put out a fire. In spite of being close to the flames, the firefighter notices a white layer of "frost" forming on the exterior of the fire extinguisher can. What's going on?


A) The gas in the extinguisher is expanding when released, cooling adiabatically.
B) The gas in the extinguisher is cooling under higher pressure.
C) The exterior temperature must be dropping.
D) The fire is pulling heat from the surrounding air.

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