Talk:Enthalpy change of solution

Physics Stub‑class Mid‑importance

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Positive vs. Negative

Am I correct in thinking that a compound with a positive heat of solution will produce a cooling effect when it is dissolved in water, and vice-versa? This article seems to support that (eg. ammonium nitrate has a substantial cooling effect; it has a positive enthalpy of solution), but if this is true, then several articles (erythritol, isomalt, and probably others) and a patent (http://www.freepatentsonline.com/20050196517.html) contain glaring errors. --Pyrochem 03:09, 11 September 2007 (UTC)[reply]

Hi, sodium chloride dissolved in water, has +3.89 kJ not kcal per mol, I'll change tat (data source, google, wiki german, and so on) —Preceding unsigned comment added by 77.239.33.181 (talk) 21:47, 14 January 2009 (UTC)[reply]

what is value for sodium hydroxide? —Preceding unsigned comment added by 153.47.0.76 (talk) 10:22, 10 March 2009 (UTC)[reply]

SI units

Since this is a scientific page and scientists havnt used calories for year the given values should really be in kJ/Mol, I wont take the desision upon myself but I deffinetly support the change