Path: ...!weretis.net!feeder8.news.weretis.net!eternal-september.org!feeder3.eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail From: Thomas Koenig Newsgroups: comp.arch Subject: Re: Continuations Date: Sat, 20 Jul 2024 08:53:26 -0000 (UTC) Organization: A noiseless patient Spider Lines: 37 Message-ID: References: <47689j5gbdg2runh3t7oq2thodmfkalno6@4ax.com> <116d9j5651mtjmq4bkjaheuf0pgpu6p0m8@4ax.com> <7u7e9j5dthm94vb2vdsugngjf1cafhu2i4@4ax.com> <0f7b4deb1761f4c485d1dc3b21eb7cb3@www.novabbs.org> <4bbc6af7baab612635eef0de4847ba5b@www.novabbs.org> <20240718193803.00004176@yahoo.com> <20240718202843.00001dd0@yahoo.com> <20240718224853.000046e1@yahoo.com> <20240719144546.0000086c@yahoo.com> Injection-Date: Sat, 20 Jul 2024 10:53:26 +0200 (CEST) Injection-Info: dont-email.me; posting-host="ccdff6c1e7e8e7cd4872288a041e1c0d"; logging-data="3651827"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX1/w8oiJk/yWhiGIH81i5mNVW+DUv66iJBQ=" User-Agent: slrn/1.0.3 (Linux) Cancel-Lock: sha1:PqAjuoINWJshZzPBFBvgaatoSb4= Bytes: 3282 Michael S schrieb: > On Fri, 19 Jul 2024 11:28:17 -0000 (UTC) > Thomas Koenig wrote: > >> Michael S schrieb: >> > On Thu, 18 Jul 2024 18:48:45 -0000 (UTC) >> > Thomas Koenig wrote: >> > >> >> Michael S schrieb: >> >> > On Thu, 18 Jul 2024 17:06:52 -0000 (UTC) >> >> > Thomas Koenig wrote: >> >> >> It does work far away from the equilibrium (which is the >> >> >> point). >> >> > >> >> > But how far? >> >> > Does it work for EA/RT outside of, say [-10:+12] ? >> >> >> >> Ea is almost always positive; if if was negative, it would mean >> >> that a reaction is is slowed down by increasing temperature (and >> >> by this don't mean the reverse reaction). >> > >> > In the branch of physical chemistry that I was taught before >> > switching to completely different profession, that's not that rare. >> > For example, when temperature grows from 1500 degrees toward 1550 >> > the transfer of phosphorus from molten steel to slag decelerates >> > greatly. >> >> Do you happen to recall if that process was limited by thermodynamic >> equilibrium, by mass transfer or indeed by a chemical reaction? > > I don't know, but would think that what causes it is an approuch to > equilibrium. But at 1550 degrees equilibrium is still pretty far away > (50-70 degrees away? I don't remember) and despite that a slowdown is > already very significant. That would also be covered by the Arrhenius equation - you have one reate for the forward reaction and one rate for the backward reaction.