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From: halle1@houxz.UUCP
Newsgroups: net.misc
Subject: Re: boiling hot water
Message-ID: <400@houxz.UUCP>
Date: Mon, 15-Aug-83 17:24:29 EDT
Article-I.D.: houxz.400
Posted: Mon Aug 15 17:24:29 1983
Date-Received: Tue, 16-Aug-83 04:27:15 EDT
References: <434@ihuxm.UUCP>
Organization: Bell Labs, Holmdel NJ
Lines: 12

The reason that hot water evaporates faster is that it takes less energy
to raise the temperature of the molecules to that needed to evaporate.
At typical tap water temperatures, and even at very hot temperatures,
the increase in evaporation is negligible.  The additional heat extracted
by evaporation is less, probably very much so, than the additional heat
content of the water due to the higher temperature.  Consequently, hot
water will NOT freeze faster.

One possible exception is if the container has a broad surface and the
volume of water is very small.  In this case, the evaporation
might be large enough to have an effect.  In the general case, however,
cold freezes first.