http://tinyurl.com/mqpszt
has some info on london forces and their effect on boiling temp. heres some thougts on similar materials and weights and mp and bp. http://cost.georgiasouthern.edu/chemistry/general/molecule/forces.htm On Sun, May 31, 2009 at 4:05 PM, William Beaty <bi...@eskimo.com> wrote: > On Sun, 31 May 2009, leaking pen wrote: > >> > If I try to boil down all the weird ideas that popped into my head, then >> > here's the real question: do atoms experience significant Vanderwaals >> > forces with nearby atoms of the same species, but not with atoms of >> > different species? (Nearby, as in 50 nanometers, not molecular bond >> > lengths.) >> >> Well, vanderwall includes so called London Forces, yes? I was under >> the impression that those occured between dissimilar atoms, for >> example, the london forces in water that cause its high viscosity and >> surface tension occure between O in one atom and H in another. > > Right, I've been labeling London force as "VanderWaals." > > So basically I'm asking whether the London force is stronger between atoms > which have matched absorption lines. The simple example would be two > large-N atoms of the same element having many matched lines, though I > recall that mercury and O2 has a match. > > Hmmm, now that you say the above, isn't the temperature of liquid Argon, > Neon, etc. determined by the London force? Mix liquid argon with neon in > 1:1 mixture, so they start keeping each other apart, and see if the > boiling point gets weird. But if the force is strong over great > distances, then maybe we'd see little effect. How about vapor pressure > over a liquid argon surface. If there was attraction, then perhaps in a > vacuum chamber the argon pressure within 10nM of the liquid argon surface > would be inexplicably high, or perhaps the condensation rate seen during > transients in vapor pressure would be higher than that predicted purely > from first principles, thermo stats. > > > Here's one possible ref: > > Search keywords: Volokitin Persson > Non-contact friction enhanced by resonant atoms > http://www.aip.org/pnu/2003/split/652-3.html > > > > > > >> Seriously, things not given high importance always seem to be where >> the breakthroughs and answers come from, dont they? > > Yeah, Vanderwaals force always seemed intriguing, only because everybody > else is only fascinated by things like numerical solution of covalent bond > physics. > >> > field must be radial and entirely contained inside the orbital? Well, >> > what happens if experiments show otherwise. And also, what happens if >> > another hydrogen atom is passing by at 30nM distance? >> >> My only question is how this tunneling creates an attraction. Is the >> electron actually imparting a force moving the atoms closer together >> while doing it? > > Photon tunneling is also called "magnetic field" and "electric field." > How could tiny electric dipoles attract each other? Whether DC fields, > or AC fields at the same frequency, I think the math is identical. But > now add a ferroelectric environment: liquid environment of water dipoles. > One might imagine that the ferroelectric liquid would behave as a shield. > But perhaps at short length scales it doesn't? > > > > (((((((((((((((((( ( ( ( ( (O) ) ) ) ) ))))))))))))))))))) > William J. Beaty SCIENCE HOBBYIST website > billb at amasci com http://amasci.com > EE/programmer/sci-exhibits amateur science, hobby projects, sci fair > Seattle, WA 206-762-3818 unusual phenomena, tesla coils, weird sci > >
