3 ms·
Freezing point of water changes with salinity and impurities. By definition a liquid cannot be below its freezing point until it has completed its phase change.
by mrloopex 2mo ago
Freezing point of water changes with salinity and impurities. By definition a liquid cannot be below its freezing point until it has completed its phase change.
- FromHoiPolloi 2mo agoYes. My point was that it's easier(?) to get below freezing point above water than below. So while the cold air keeps the upper part of the iceberg (relatively) intact - it will slowly melt below the sea until the center of gravity changes enough to flip over.
- RetroTechie 2mo ago> By definition a liquid cannot be below its freezing point until it has completed its phase change. Supercooled water is a thing: (and I've seen it a few times myself) https://en.wikipedia.org/wiki/Supercooling https://en.wikipedia.org/wiki/Supercooling
- wahern 2mo agoSuperheating, too, and that's something that can happen in a microwave, occasionally causing severe burns when superheated water flash boils. AFAIU, it's the same phenomenon--lack of nucleation sites to kick-off the phase transition.
- mrloopex 2mo agoDoes that mean every TTT diagram is wrong? Nevermind I just learned about CCT diagrams. I guess having only one year of materials engineering means I should STFU. :)