Timeline for In practice, do polar molecules actually align in an electric field?
Current License: CC BY-SA 3.0
7 events
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| Apr 13, 2017 at 12:57 | history | edited | CommunityBot |
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| Oct 12, 2016 at 0:17 | vote | accept | ericnutsch | ||
| Oct 6, 2016 at 5:46 | comment | added | Ivan Neretin | Come to think of it, yes, water would contain ions and thus would form some double layer and have some Debye length. All that goes twice for $\ce{HF}$, to the point that it must have been a trouble to measure its dielectric constant at all. Still, it is there in the reference books. | |
| Oct 6, 2016 at 4:58 | comment | added | ericnutsch | Ok. Maybe water is just the oddball because it dissociates into ions; I'm reading that even pure water will self-ionize. Since HF is borderline ionic, would it break into ions and shield the rest of the volume, or would its bond be strong enough to hold it together? It has a high dielectric strength, but so does water supposedly. Is there a way to know or calculate if other polar molecules like Acetonitrile will break down instead of "statistically" orienting in an electric field? | |
| Oct 5, 2016 at 23:44 | comment | added | Ivan Neretin | True, but those are liquid crystals, and that's another story. They are already kinda ordered without any field, much like domains in a ferromagnetic. | |
| Oct 5, 2016 at 21:54 | comment | added | Zhe | Also, note that the correct function of LCDs depends on the alignment under an electric field. | |
| Oct 5, 2016 at 8:47 | history | answered | Ivan Neretin | CC BY-SA 3.0 |