On 12/24/2018 11:03 AM, Frank wrote:
On 12/23/2018 1:44 PM, Pat wrote:
On Sun, 23 Dec 2018 12:28:30 -0500, Frank "frank wrote:

On 12/23/2018 11:44 AM, Martina wrote:
replying to Tom Lachance, Martina wrote:
SO, THE QUESTION IS,,,IS IT OKAY TO USE SNOW AS AN INSULATOR? iT IS -28
HERE
TONITE


Interesting question. I see that propane has a boiling point of
-43.6°F. When it evaporates it will cool the tank. If tank were fully
insulated so no heat could get in, propane would not boil. Not sure
snow on or off tank would make a difference.
Huh? Boiling points depend on pressure as well as temperature. It
stays liquid in the tank because it's under pressure. What is the
freezing point of propane?


That's right. The boiling point is for one atmosphere pressure. At
temperature below the boiling point you won't get any propane.

For a simple home science experiment, chill a BIC lighter below 32
degrees F and see how well it works. Butane's boiling point is right
around 32.