Скачать или смотреть Holiday Physics: The AMAZING Thermodynamic Properties of Snow and Ice

Happy Holidays Everyone! For this final video of the year I thought I'd do a themed video about the amazing thermodynamics of ice and snow.

Technical Caveat: The crystal structure of ice discussed in this video is called Ice Ih ("h" for hexagonal). There are actually many different solid forms of ice depending on pressure. Specifically, it is believed that Ice Ih actually ISN'T the most stable form of ice at atmospheric pressure, rather it is believed to be Ice XI. Ice XI does NOT have residual entropy.

So technically, given an infinite amount of time - as you cool to absolute zero - Ice Ih should transform into Ice XI and there is no residual entropy. However, the time it takes Ice Ih to turn into Ice XI is so outrageously long it's literally in the millennia. So for pretty much all intents and purposes if you take water at atmospheric pressure and cool it towards absolute zero in a lab, you will find Ice Ih and it will have residual entropy as discussed.