[NicknamedBob]

"Yep.
Going to have to do an experiment with this.
The bit i would like to know for sure is if the higher rate of change continues in the ‘Hot’ water after it has reached the initial state of the ‘Cool’ water, or if the rate of change slows to match that of the ‘Cool’ water.

Have to borrow the Laser thermometer and have a play in the freezer."

Sounds like something Darks would do.

The physics is the same for both. A colder object will freeze more quickly than a warmer object. What's happening is that the warmer water tends to evaporate in the freezer, incidentally putting frost on the walls that has to be dealt with at some point.

It doesn't get a "head start" toward freezing, but by the time it catches up to the cooler water sample, there's less water volume left. It is this phenomenon, having the ice-tray end up half-filled, that lets a "warm-water" sample freeze faster than a "cool-water" sample.

Save yourself trouble, and fill your trays with cool water, so that you get big, high-capacity cubes to work with, rather than those dinky little slivers that only serve to dilute your beverage choice.

[Tax-chick]

I have an automatic ice maker. The dispenser part through the door doesn’t work anymore, but we can still make ice.

[Monkey Face]

I use a Pur filter, so the water is always “cool” if such can be said about water in the desert in the summer.

It’s just that I get fiercely thirsty (CFIDS does that) and need ice water, even in the winter. So there are several ice cube trays in the freezer at any one time. However, I totally spaced it in my preparations to house sit, and could have come home to good, solid ice cubes.

And then, to make matters worse, I spaced it yesterday and really had to play “catch-up” by sticking a pint bottle of water in the freezer for an hour. I hate when I do stuff like this.

[Darksheare]

Mpemba effect?