4B70.27 - Adiabatic Cooling - Fire Extinguisher

Code Number:
Demo Title:
Adiabatic Cooling - Fire Extinguisher
Adiabatic Cooling
Area of Study:
Heat & Fluids
Thermometer with Bead Thermocouple and Fire Extinguisher.

Video Credit: Jonathan M. Sullivan-Wood.

Place the bead thermocouple into the small hole drilled for it in the collar of the fire extinguisher.  Secure this in place with a couple of zip ties.  Observe the temperature as you discharge the fire extinguisher.  The temperature should fall well below 0 degrees C.

  • Jacques-Olivier Goussard and Bernard Roulet, "Free Expansion for Real Gases", AJP, Vol. 61, #9, Sep. 1993, p. 845.
  • Julius Sumner Miller, Q81 & A81, Millergrams I – Some Enchanting Questions for Enquiring Minds, p. 52 & 104.

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