----- Original Message ----- From: [EMAIL PROTECTED] Date: Tuesday, December 9, 2008 5:35 pm Subject: Re: [Vo]:Mizuno comments on CH molecules, and on his personal situation
> In reply to Edmund Storms's message of Tue, 9 Dec 2008 15:04:33 - > 0700:Hi, > [snip] > >Apparently all spontaneous nuclear reactions are exothermic. This > is > >required because a nuclear process cannot obtain the required > large > >amount of energy from the local environment fast enough. In > contrast, > >a chemical reaction is much slower and is satisfied with energy > that > >can be stolen from a few surrounding atoms. > > > >Ed > This is fine, but not a complete answer. The question that Jed asks is > legitimate, and is also an option that I suggested in slightly > different words > some days back. > > Though individual endothermic reactions don't occur, a "compound" > reaction might > occur. Such a reaction would actually only be a single reaction, > but could be > thought of (or viewed) as a combination of exothermic and > endothermic reactions. > The sort of reaction I'm talking about is e.g. where two or more > nucleitemporarily fuse, then fission into different fragments than > they started out > as. Reactions of this sort *could* end up being only very slightly > exothermic,and could be classed as almost pure transmutation > reactions. > In fact conventional fission is an example of this. Two "nuclei" > fuse, i.e. a > U235 nucleus and a single neutron, which is followed by fission > into a variety > of fragments. However in this case the energy release is considerable. > > Regards, > > Robin van Spaandonk <[EMAIL PROTECTED]> > If He4 splits into D2+D2 wouldn't that be endothermic if the reverse process is exothermic? Harry
