Hi Robin, the NIST webbook, which I find much handier indeed than those CRC handbooks, doesn't solve the controversy which is "is the energy produced in a reaction equal to -dG or to -dH? (d=delta)"
BTW I just found that I was wrong in thinking that my trial version of CHEMIX had expired, it seems it only counts down the days in which you actually use the software, nice ! :) So here is CHEMIX's thermochemistry answer for the reaction we discussed (copy-paste): 2H2(g) + O2(g) = 2H2O(l) + 571.6kJ which solves the controversy (produced energy is equal to -dH=572kJ/mol, not to -dG=474kJ/mol), doesn't it Fred? :))) Michel ----- Original Message ----- From: Robin van Spaandonk To: vortex-l@eskimo.com Sent: Sunday, June 04, 2006 5:13 AM Subject: Re: Free Radical Chain Reactions In reply to Michel Jullian's message of Sat, 3 Jun 2006 20:58:38 +0200: Hi, [snip] >The spreadsheet did the dH algebra like it's own mentor told it, Fred. > >You could try downloading the trial version of CHEMIX (Google it) ans see >what their thermochemistry section gives for this reaction? Mine has >expired, and was in Norwegian or something for some reason (must have >missed the language option) [snip] You may both find this of use :) http://webbook.nist.gov/chemistry/form-ser.html.en-us.en Regards, Robin van Spaandonk http://users.bigpond.net.au/rvanspaa/ Competition provides the motivation, Cooperation provides the means.
