[Energy] DIY heating pads! Easy cheap & fun!

Ted Moallem ted.moallem at gmail.com
Mon Nov 7 23:47:06 EST 2011


To anyone starting to experiment with sodium acetate for heat packs, some
quick advice:

1) you shouldn't be boiling sodium acetate directly.  Boil water and melt
NaOAc in a separate glass/flask sitting in the boiling water.  Then you can
pour it into bags and eliminate air bubbles before sealing, etc.

2) the baking soda + vinegar reaction is not efficient.  it's great to be
able to cite this reaction as evidence that NaOAc is relatively safe.
 However, much easier to order the salt in crystal form.

Ted


On Mon, Nov 7, 2011 at 1:59 PM, Sage Radachowsky <sage.radachowsky at gmail.com
> wrote:

> Oh yeah!   I forgot about this ...
> http://www.youtube.com/watch?v=hGyyTPBZMh4
>
> Ingredients:   vinegar, baking soda, plastic bags, hair clips!
>
> Who has any time to try this?
>
> We could make them by the hundreds.  Boil them in bulk, and bring them
> back to camp.
>
> Sage
>
>
>
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-- 
________________________________

Theodore Moallem, Ph.D.
moallem at mit.edu

http://BlindLead.mit.edu
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