Re: pinhole Dumb question number 564

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From: Paul Doherty (pauld@exploratorium.edu)
Date: Sat Apr 13 2002 - 14:19:41 PDT 

Message-Id: <l0311071fb8de50a666ca@[192.174.3.125]>
Date: Sat, 13 Apr 2002 14:19:41 -0700
From: Paul Doherty <pauld@exploratorium.edu>
Subject: Re: pinhole Dumb question number 564

Hi Mark

It's more complicated than that.

If you had salt NaCl which features non-directional ionic bonds then the
distance between oppositely charged ions would allow you to calculate
electrical potential energies. increased distances between the ions would
indeed be increased electrostatic potential energy.

alas with hydrogen bonds in water it is not that simple.

Paul D

>Changes in potential energy make sense to me when a
>liquid turns into a solid. Since there is less space
>between the particles there is less potential energy.
>Okay. But what happens when water freezes? Is there
>actually an increase in PE as the solid forms? Or is
>the reduction in PE a net result of the hydrogen
>bonding (reduced electrical PE) versus increased
>positional PE?
>
>Thanks.
>
>=====
>Marc Afifi
>Chemistry, Physics, Algebra 1B
>Pacific Grove High School
>Pacific Grove, CA
>
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