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Discussion and Debate
Discussion and Debate
Physical & Life Sciences
Creation & Evolution
Entropy and How can something come from nothing? And some evolution......
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<blockquote data-quote="Frumious Bandersnatch" data-source="post: 741412" data-attributes="member: 7449"><p>Like I said, I don't dispute that this definition of closed system exists, in fact I believe that I said that is not only exists but it is a source of confusion because it is different from the standard definition used in chemistry. It looks to be popular in biology for some reason. So now, suppose we are going to try to teach some thermo with this definition. Do we run a Carnot cycle to explain the second law in an open system? No that won't work because mass flow can mess things up. Do we do it in a "closed" system as defined here. No we can't because heat flow is obviously needed for a heat engine. Looks like we're stuck. That's why I prefer the standard definition of open, closed and isolated which is found in all the texts that I have used to either study or teach thermodynamics. </p><p></p><p>The Frumious Bandersnatch</p></blockquote><p></p>
[QUOTE="Frumious Bandersnatch, post: 741412, member: 7449"] Like I said, I don't dispute that this definition of closed system exists, in fact I believe that I said that is not only exists but it is a source of confusion because it is different from the standard definition used in chemistry. It looks to be popular in biology for some reason. So now, suppose we are going to try to teach some thermo with this definition. Do we run a Carnot cycle to explain the second law in an open system? No that won't work because mass flow can mess things up. Do we do it in a "closed" system as defined here. No we can't because heat flow is obviously needed for a heat engine. Looks like we're stuck. That's why I prefer the standard definition of open, closed and isolated which is found in all the texts that I have used to either study or teach thermodynamics. The Frumious Bandersnatch [/QUOTE]
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Entropy and How can something come from nothing? And some evolution......
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