Thermodynamics and Energy


Mpemba Effect Explanation

Authors: Ilias J. Tyrovolas

Water molecules are dipoles positioned and oriented joined by hydrogen bonds. When water is heated this structure collapses (increasing entropy). After the water is recooled to a lower temperature the structure is not reconstructed immediately but needed some time. Time is not always available inside a freezer because the cooling process is fast. Entropy reduction curves function of temperature S=f(T) appear retardation (lagging) relative to entropy growth curves. The water after was heated and recooled at the starting temperature, has more entropy than before it was heated. That means that molecules have now the same kinetic energy, but thermal motion before heating was more oriented by the structure mentioned above. Recooling random collisions are more possible leading to faster temperature’s reduction.

Comments: 2 Pages.

Download: PDF

Submission history

[v1] 2013-09-11 06:38:38
[v2] 2016-11-02 04:17:05
[v3] 2017-05-24 06:48:13

Unique-IP document downloads: 159 times is a pre-print repository rather than a journal. Articles hosted may not yet have been verified by peer-review and should be treated as preliminary. In particular, anything that appears to include financial or legal advice or proposed medical treatments should be treated with due caution. will not be responsible for any consequences of actions that result from any form of use of any documents on this website.

Add your own feedback and questions here:
You are equally welcome to be positive or negative about any paper but please be polite. If you are being critical you must mention at least one specific error, otherwise your comment will be deleted as unhelpful.

comments powered by Disqus