字幕列表 影片播放 列印英文字幕 So... what I'd really like to do Let me start again... So of all the video I´ve been involved with for Sixty Symbols Numberphile and Brady´s million other channels The one I´m least happy with by far is the one we did in entropy We even then did a follow up with a "solo mea culpa" Where I uhm... pointed outs where there are some importants details seeing where we just gloss over I really wanna revisit entropy and Brady is gonna endorse me, what is great What it might and might not A lot starts from this the work of this guy a guy called Frank Lambert And notice, It says Disorder- A cracked crutch for supporting entropy discussions So every time you hear entropy mention, or the vast majority of times I'm certain on the undergraduates I'm certainly in the other Sixty Symbols video we did the same thing We made this link between entropy and disorder For a person who isn't a scientist and even for a person who is a scientist that is actually a very difficult and very confusing link to make because: for example the argument is that, you know... entropy is always increasing... disorder is always increasing... How does this happen? so this is from my kid´s crystal growing kit So we get crystals. How do we get lovely structures like this? Beautiful structures. This is the crystal structure of silicon how do we get this extended over, you know huge pieces of silicon How much more ordered do you wanna get? And then the argument is that disorder is always increasing How, then, do you take, you know, atoms in a melt... or atoms in a gas phase and this how we grow silicon They're pretty disordered, you would argue And then they hit the surface, and they grow and they built, and they form this structure So, that seems to be, from on the face of it a pretty good example of something which is very disordered turn into something very ordered That's the issue with using order and disorder to explain entropy and this is something that this guy, Lamberd has been banging on about for quite some time and quite rightly banging on about Because it's exceptionally, exceptionally misleading. I wanna cover just very briefly, uhm... two aspects of this You know, you could then quietly right ask me Well, you know, how it does happen then? Does it breaking the secound law of thermodinamics? The fact of to see in this apparent disorder to order transition intead of other way round? Have the laws of thermodynamics suddenly gone wrong? Have we missunderstood everything? The important in here is if you got to take into account the entire system You've got to take into account whether the system is closed or opened if those energy or matter flow All of those different things, we can even reduce it further to make the argument of this even simpler, the important thing that we are neglecting When we talk about just the atoms forming in order or disorder Is what's the role of energy and in particular when those atoms bond they give off heat energy and that heat energy is an exceptionally important contribution to the "disorder" of the system
B2 中高級 熵的困惑--60個符號 (Entropy Confusion - Sixty Symbols) 1 0 林宜悉 發佈於 2021 年 01 月 14 日 更多分享 分享 收藏 回報 影片單字