this post was submitted on 07 Jun 2023
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[–] SkepticElliptic@beehaw.org 2 points 1 year ago (1 children)

It requires very specific circumstances. Given the same ambient temperature hot water will cool at a faster rate than cooler water because of the greater temperature differential.

Hot water will lose more mass as more will evaporate as it cools.

https://en.m.wikipedia.org/wiki/Mpemba_effect

It's one of those "wacky" physics facts.

[–] gnuhaut@lemmy.ml 4 points 1 year ago

In 2016, Burridge and Linden defined the criterion as the time to reach 0 °C (32 °F; 273 K), carried out experiments, and reviewed published work to date. They noted that the large difference originally claimed had not been replicated, and that studies showing a small effect could be influenced by variations in the positioning of thermometers: "We conclude, somewhat sadly, that there is no evidence to support meaningful observations of the Mpemba effect."

I'm with those guys.