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Topic: Thermodynamics and entropy  (Read 2860 times)

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Offline StonerPenguin

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Thermodynamics and entropy
« on: May 12, 2010, 03:04:17 PM »
Hello everyone, I need a little help with this question;
“You are sitting in a warm room.  Suddenly, on its own all the heat energy in the room collects in one corner, leaving the rest of the room so cold that you are frozen to an icicle.  Based on thermodynamics, why is this impossible?”

For some reason I'm having a hard time putting an answer to this question in real words  :-X I know it has something to do with entropy naturally tending to increase rather than drop, and in the described situation there would be a huge drop in entropy, making that impossible. But I still can't really write a coherent answer, so I'd really appreciate help because I'm not sure a really understand the whole entropy thing myself :-[

By the way, thank you JGK. I'm sorry for not thanking you sooner for double-checking my work, thank you so much for your help :D
« Last Edit: May 12, 2010, 03:17:32 PM by StonerPenguin »

Offline MrTeo

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Re: Thermodynamics and entropy
« Reply #1 on: May 12, 2010, 03:24:11 PM »
You could explain this quite easily using the probabilistic interpretation of entropy: each system develops towards the most probable state.

It's clearly impossible that among all the energetic configurations the system naturally chooses the one you described. That's why you'll always find a more or less homogeneous distribution of energy in the room.
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Offline Borek

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Re: Thermodynamics and entropy
« Reply #2 on: May 12, 2010, 06:12:23 PM »
It's clearly impossible that among all the energetic configurations the system naturally chooses the one you described.

Technically it is not impossible, just the probability is so low that we will never see it.
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