Snowflakes are a good example of the fact that thermodynamic entropy isn't the same as "order" as perceived by humans. The snowflake has higher entropy (2nd law) than the water + air system that formed it, even though it looks far more organized. https://twitter.com/ZonePhysics/status/1160843941857648640 …
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Replying to @fchollet
I'm sorry but this is just wrong. The snowflake has lower entropy, and the closed system has higher entropy (by 2nd law), so not sure this shows anything. *Any* local reduction in entropy (e.g "creation of order") requires global increase or maintenance of entropy.
3 replies 0 retweets 36 likes -
Replying to @egrefen
You're completely misreading the tweet though. The snowflake + surrounding air has higher entropy than snowflake + surrounding air system it comes from. That's the 2nd law. That's right in the tweet.
3 replies 0 retweets 2 likes -
The tweet defines "water plus air" as the "system" and references the second law. You can't get clearer than that. Yes I could have said "snowflake plus surrounding air" a second time but that's over the character limit and unnecessary. Christ
1 reply 0 retweets 1 like
I said it elsewhere, you can make the same point in many other ways, e.g. some guy sealed up in an untidy room who tidies it up. The entropy of the room increases but it looks increasingly more organized What's nice about crystal formation is that it doesn't involve intelligence
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