Date: Sat, 13 Sep 2003 17:40:46 -0400

Author: "Fred Stein"

Subject: Re: Latent Heat

Post:

Another way to demonstrate latent heat to students as young as middle school is to heat a beaker of water that contains a large test tube of pure parafin wax until the wax melts completely. Each beaker and tube will contain a thermometer. Have students record the temperature of water and wax on a temp vs. time graph. Both curves will be quite close until the wax plot goes horizontal for awhile and then rejoins the water cooling curve. Ask. "What happened?"
Fred Stein

Dr. Fredrick M. Stein
Director of Education and Outreach
American Physical Society
One Physics Ellipse
College Park, MD 20740-3844
(301) 209-3263
(301) 209-0865 fax
stein@aps.org
http://www.aps.org/educ/
>>> dstille@newton.physics.uiowa.edu 09/12/03 15:37 PM >>>

JZ,

The only one I have on my shelf at the moment is Latent Heat of
Crystallization. Sodium Acetate handwarmer that goes from liquid to solid
with heat produced.

Later,
Dale

On Fri, 12 Sep 2003, Gerald Zani wrote:

> Tappers,
>
> How do people demonstrate latent heat?
>
>
> Thanks,
> Jerry
> Gerald Zani e-mail: Gerald_Zani@brown.edu
> Manager of Demonstrations phone: (401) 863-3964
> Department of Physics FAX: (401) 863-2024
> Brown University Providence, RI 02912-1843 USA
>
> URL http://www.physics.brown.edu/users/staff/zani/index.html
> URL http://www.physics.brown.edu/Studies/Demo/
>
> Do a little more of that work which you have confessed to be good,
> Which you feel that society and your most Just Judge rightly demand of you.
> Cultivate the tree which you have found to bear fruit in your soil.
> If you have any experiments you would like to try, try them.
> Now's your chance.
> Henry David Thoreau, Journal entry, 1850.
>
>



From mlowry@D115.ORG Sun Sep 14 17:13:13 2003

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