Is there an optimal temperature for the Mpemba Effect? If so, what is it?

If a specific example is needed: There is a 100 milliliter sphere of water floating in air at -10 °C. At what initial temperature greater than ~10 °C1 will the temperature of said water drop to 0 °C the fastest?

1Or whatever the local maximum nearest to 0 °C in a temperature/time to freeze graph is.

  • 1
    $\begingroup$ There is no such thing as the Mpemba effect! If you're talking about the remaining water freezing faster because you've evaporated most of the rest away, then this can't be answered without at the very least knowing the humidity of the air. $\endgroup$
    – user10851
    Jan 17, 2014 at 18:02
  • 2
    $\begingroup$ I don't think the evidence in the linked question is sufficient to conclude that there is no such thing as the Mpemba effect. Although John found that the layer of frost seemed to be responsible, I believe other people have done experiments that controlled for that, and under certain circumstances, they have still found the effect to work. $\endgroup$
    – David Z
    Jan 17, 2014 at 18:18

1 Answer 1


To maximize Mpemba effect we have to maximize the entropy content of the drop.Supposed P=1 atm,to do this we have just to maximize the temperature.The maximum temperature we can get without loosing the drop by evaporation is 100 oC.


Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.