[NewCandle] crystallization weight change transients

[Colin Quinney]

From: "Nick Reiter" <avalonbiker at yahoo.com>
Sent: Wednesday, September 27, 2006 3:15 PM


>
> Any input from the peanut gallery as to readily
> soluble salts that would be endothermic in
> crystallization would be hugely appreciated.

Peanut Gallery here.
How about the reverse of crystallization.? and endothermic.

I went to a medical supply store today and I picked up an "Instant Cold" 
compress. by Formedica. Contents not listed.
It is a sealed plastic bag that contains an unknown granulated substance and 
an (interior) bag of water. Instructions are to break the interior bag of 
water and the dry chemical will then become hydrated. costs $2
I weighed the granules. 140 grams.
http://www.faqfarm.com/Q/What_kind_of_liquid_is_in_instant_cold_packs
Might be ammonium nitrate. (danger Will Robinson) or it might be urea.

I also stopped at the sports store on the way home and picked up a "Hot 
Pad", and I read the contents as: iron dust, activated charcoal powder, 
cellulose, and zeolite. (how is that exothermic?)

Colin