5 ms·
> At those pressures, hydrogen becomes a fascinating metallic solid conducting electricity just like copper and is predicted to be a room temperature supercondu
by deostroll 6y ago
> At those pressures, hydrogen becomes a fascinating metallic solid conducting electricity just like copper and is predicted to be a room temperature superconductor
I didn't get the room temperature superconductor part.
- coolspot 6y agoIf you compress hydrogen to that pressure and keep it compressed in let’s say a really strong shell, then it will have superconductivity even at room temperature.
- rishav_sharan 6y agoQuick question, can you really have room temperature at that pressure? I thought extreme pressures would always result in extreme temperatures.
- wtallis 6y ago> I thought extreme pressures would always result in extreme temperatures. At least classically, it's the process of compressing that yields the extreme temperatures, not the state of having been compressed. If you maintain the pressure, the hot compressed material will transfer thermal energy to its surroundings until it has cooled back down to room temperature, and it does not require further work to be done on the compressed material to keep it compressed.
- gruturo 6y agoIf you keep it compressed, it will eventually cool down, but stay compressed.
- rbanffy 6y agoIf it's a solid in that state, will it remain a solid if you remove the container?
- layoutIfNeeded 6y agono
- rbanffy 6y agoOw... That's disappointing.
- ben_w 6y agoI think it’s still an open question if it is metastable (like diamond>graphite), but it definitely wouldn’t be stable. https://physics.stackexchange.com/questions/308290/are-there-published-predictions-that-hydrogen-could-remain-metallic-at-ambient-p/308301#308301 https://physics.stackexchange.com/questions/308290/are-there...
- rini17 6y agoDepends. If you remove the container quickly, then it explodes. Dong it slowly, some of the material evaporates and thus cools the rest, so that you can end up with piece of ultracold solid. But it will most likely not have same properties as the original material.
- fanf2 6y agoThat sentence is not great because copper is not a superconductor. https://www.engineeringenotes.com/metallurgy/metal-conductivity/superconductivity-of-metals-metallurgy/42026 https://www.engineeringenotes.com/metallurgy/metal-conductiv...