Engineer Roland Krevitt, left, of Scotts Valley, and inventor and metallurgist Bob Wallace, 93, have reverse engineered an Epi-Pen to estimate the cost to make a two-pack of the lifesaving auto-injector that retails for more than $700. Their verdict: $8.02. (Patrick Tehan/Bay Area News Group)
The freezing point of ethanol or ethyl alcohol (C2H6O) is around â114 Â°C; â173 Â°F; 159 K. The freezing point of methanol or methyl alcohol (CH3OH) is around â97.6 Â°C; â143.7 Â°F; 175.6 K. You'll find slightly different values for the freezing points depending on the source because the freezing point is affected by atmospheric pressure.
Ethanol boils at 78.4 Â°C, water boils at 100 Â°C, but the azeotrope boils at 78.2 Â°C, which is lower than either of its constituents. Indeed, 78.2 Â°C is the minimum temperature at which any ethanol/water solution can boil at atmospheric pressure.