Posted by George Wellman on July 28, 1999 at 06:49:40:
In Reply to: PROPANE TANK for air posted by Gary on July 28, 1999 at 06:33:37:
In some circumstances, such as water pipes, the hot water line often does freeze first. The reason is the solubility of air is higher in cold water
than hot. The dissolved air lowers the freezing point of the water. It seems counterintuitive, but under the right cirumstances, it is easily explained
on well known chemical principles.