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I only "know" the second one and that only because entropy is weird and coolyeah, i guess thats right. it would be sad if only half of the people believed say, the laws of thermodynamics....
then again, i dont know if half of the people even know what that is. =)
IB standard level chemistry makes even entropy appear dullDo more chemistry!
I say do not partition science.Technically, most people should know the first law of thermo. It's little more than a restatement of the conservation of energy.
Change in internal energy of system = Change in heat energy - Work done on system.
Technically, most people should know the first law of thermo. It's little more than a restatement of the conservation of energy.
Change in internal energy of system = Change in heat energy - Work done on system.
Really? I wonder where they come into, say, cognitive science or taxonomyI say do not partition science.
If you're going to be in any science-related field, you have got to know all 3 laws of thermodynamics.
Well, a zero-temperature state would be a state where, quantum mechanically, the entire system is in its ground state. Since the ground state is unique, this would also describe a zero-entropy situation. What we learn from thermodynamics, however, is that one can only asymptotically approach zero entropy in a particular system: one can never actually reach zero entropy. Then there's the whole mess about quantum fluctuations messing the whole thing up anyway.I don't know if dies is the right word, but I was under the impression that entropy was one of those properties that could be created or destroyed. And it looks like others have the same idea.
Which is also why I didn't say it goes to zero, I just said that it decreases. But I have to admit that physics isn't my strong point (I mostly know where it overlaps with chemistry). And quantum mechanics just makes my head hurt at this point.Well, a zero-temperature state would be a state where, quantum mechanically, the entire system is in its ground state. Since the ground state is unique, this would also describe a zero-entropy situation. What we learn from thermodynamics, however, is that one can only asymptotically approach zero entropy in a particular system: one can never actually reach zero entropy. Then there's the whole mess about quantum fluctuations messing the whole thing up anyway.
Well, a zero-temperature state would be a state where, quantum mechanically, the entire system is in its ground state. Since the ground state is unique, this would also describe a zero-entropy situation. What we learn from thermodynamics, however, is that one can only asymptotically approach zero entropy in a particular system: one can never actually reach zero entropy. Then there's the whole mess about quantum fluctuations messing the whole thing up anyway.
Actually, you said it deceases. Hence my previous attempt at a jokeWhich is also why I didn't say it goes to zero, I just said that it decreases. But I have to admit that physics isn't my strong point (I mostly know where it overlaps with chemistry). And quantum mechanics just makes my head hurt at this point.
Actually, not really. This just changes what you mean by the ground state of a multi-particle system made up of fermions (all energy states up to N filled, where N is the number of particles). The ground (lowest-energy) state is still unique, and thus zero entropy.It would also create a problem for fermions, which cannot occupy the same state within a system.
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