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Freezing Mixtures and Cooling Agents

Freezing mixtures, cooling agents and freezing points

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Freezing points for water with freezing mixtures based on salt and ice:

Freezing MixtureTemperature Change (oF)Temperature Change (oC)
FromToFromTo
  • Ammonium Nitrate (NH4NO3) - 1 part
  • Water - 1 part
50 3 10 -16
  • Calcium Chloride (CaCl2) - 3 parts
  • Snow or ice - 2 parts
32 -27 0 -33
  • Potassium Hydrate (KOH) - 4 parts
  • Snow or ice - 3 parts
32 -35 0 -37
  • Sal Ammoniac (NH4Cl) - 5 parts
  • Saltpeter (KNO3) - 5 parts
  • Water - 16 parts
50 10 10 -12
  • Sal Ammoniac (NH4Cl) - 1 part
  • Saltpeter (KNO3) - 1 part
  • Water - 1 part
46 -11 8 -24
  • Salt (NaCl) - 1 part
  • Snow or ice - 3 parts
32 0 0 -18
  • Salt (NaCl) - 1 part
  • Snow or ice - 1part
32 -0.4 0 -18

Ammonium Nitrate - Chrushed Ice or Snow in Water

  • 1 part Ammonium Nitrate - 0.94 parts Ice/water : temperature -4oC
  • 1 part Ammonium Nitrate - 1.20 parts Ice/water : temperature -14oC
  • 1 part Ammonium Nitrate - 1.31 parts Ice/water : temperature -17.5oC
  • 1 part Ammonium Nitrate - 3.61 parts Ice/water : temperature -8oC

Calcium Chloride - Chrushed Ice or Snow in Water

  • 1 part Calcium Chloride - 0.49 parts Ice/water : temperature -20oC
  • 1 part Calcium Chloride - 0.61 parts Ice/water : temperature -39oC
  • 1 part Calcium Chloride - 0.70 parts Ice/water : temperature -55oC
  • 1 part Calcium Chloride - 1.23 parts Ice/water : temperature -22oC
  • 1 part Calcium Chloride - 4.92 parts Ice/water : temperature -4oC

Sodium Chloride - Chrushed Ice or Snow in Water

  • 1 part Sodium Chloride - 2 parts Ice/water : temperature -18oC

Evaporating Liquid Gases at Atmospheric Pressure

  • Liquid Oxygen : temperature -183oC
  • Liquid Nitrogen : temperature -196oC
  • Liquid Helium : temperature -269oC
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