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.
Engine coolant has to remain warm enough to stay fluid so it can be pumped through an engine. Water alone won't work; it will freeze too quickly. Coolant with a 50/50 mix of water and ethylene alcohol (anti-freeze) can function at temperatuares as cold as negative 36 degrees Fahrenheit. The acceptable range for an engine to run at sits between 195 degrees and 220 degrees Fahrenheit. This assumes a person is running a 50/50 mix of antifreeze and water.