No hot water during a freeze

Lantley wrote:

S Davis wrote:

Wadcutter wrote:

Lantley wrote:

wa8yxm wrote:

J&R wrote:
Hot water will freeze before cold water.

That is a myth

It's not a myth. It's basic high school chemistry

Then you slept thru your high school chemistry class.
Still water freezes at 32 deg F. Remember that from your high school chemistry. So what it takes to freeze water is to drop the temp from its existing temp to 32 deg. That requires a transfer of heat away from the water. If the beginning temp of the water is 60 deg then it requires a transfer of 28 deg to drop the water to freezing. If the water is 200 deg then it requires a transfer of 168 deg. That is simple high school chemistry.
You flunked your class. Stay after school. Re-read the chapter on heat transfer. Do some extra credit work and maybe you'll pass chemistry this semester.

So what happens if there is less water, does it freeze faster?

I won't even bother to explain why hot water freezes faster because I don't think you would understand anyway. The idea that hot water freezes faster is a known phenomenon. It's not an idea that just came along within this thread.

Aw come on my small brain might grasp it if you talk slow. A smaller mass will lose heat quicker and freeze faster as it will have less stored energy than a larger mass. I have seen and learned a lot in 32 years in plumbing and hydronic heating, most of the time hot water lines freeze faster and first. I have thawed and fixed hundreds of frozen pipe jobs so that is real world experience.