Chemical Forums

Chemistry Forums for Students => Physical Chemistry Forum => Topic started by: yamakazi on April 08, 2004, 01:52:43 AM

Title: instant compress
Post by: yamakazi on April 08, 2004, 01:52:43 AM

hi everybody
i wanted to know how hot or cold compress works and what chemical reactions are used in that.
help me plz  

Title: Re:instant compress
Post by: gregpawin on April 12, 2004, 03:10:10 AM

Sorry for the late reply but I've been looking around for the specific reaction with no results.  Gosh my thermodynamics is rusty but this is an endothermic reaction...
dG=dH-TdS... so I'm thinking the entropy term dominates... I wonder if anyone could correct me on that.

Title: Re:instant compress
Post by: Mitch on April 13, 2004, 02:27:36 PM

Sandra is the resident expert on the reaction. I'll try to get her to post it again.