I'm interested in the reaction of NH4Cl (sal ammoniac) and water.  I've been trolling google for basic info.  Mostly I end up with chemistry tests.  Specifically I'm interested in the higher temperature reactivity of a supersaturated solution.

#1) I know the reaction is endothermic but I'm looking for the actual KJ of heat absorbed/mol of NH4Cl.

#2) Where can I find solubility info on the saturation of NH4Cl in water?

#3) MOST IMPORTANT: What are the issues of this reaction at higher temperatures. I.E. if this reaction took place inside a sealed vessel up to 65 deg C.  Does it make gasseous HCl or ammonia, and is it reversable if cooled?  I don't want to make any dangerous byproducts.

#4) What happens if the mixture goes up to 175 deg. C?  Would this be really bad?
What is the worst case scenario with this reaction?

My apologies.
I thought perhaps I originally posted it in the wrong forum and that it belonged under "inorganic" rather than "general".  I was only trying to get it in the right place.  At first I did not realize that the board had multiple topic indexes and how that they were arranged on the site.
I also did not think that people routinely read posts across multiple sections.
It won't happen again.

Thanks,
Shawnbob