• Karyoplasma@discuss.tchncs.de
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      7 days ago

      tl;dr Around -21°C (-9°F). Realistically probably a tad lower than that.

      Formula for freezing point depression is:

      ΔTf = i * Kf * m

      ΔTf = freezing point depression in absolute degrees (C or K)

      i = van 't Hoff factor, the number of particles the solutes splits into, ethanol does not split, so 1

      Kf = freezing point suppression constant, for water 1.86°C * kg / mol

      m = molality of the solution (aka how much you add), looked it up and it’s 11.42 mol for 40% ethanol/water mixture

      1 * 1.86 * 11.42 = 21.2412°C
      

      In reality, Jägermeister is not a pure water/ethanol mixture and all that other stuff in there drops the freezing point by a bit as well. Ethanol is the biggest contributor tho. So maybe add 1° or 2° to this.


      Is Jägermeister really that green in the US?