Laws of thermodynamics
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Laws of thermodynamics
What are the three laws of thermodynamics? I was a bit confused when they were mentioned in class.
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Re: Laws of thermodynamics
1. delta U = heat+work
2. For reversible system, deltaS of universe equals 0.
3. at 0K for a perfectly ordered molecule, the entropy change is 0
2. For reversible system, deltaS of universe equals 0.
3. at 0K for a perfectly ordered molecule, the entropy change is 0
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Re: Laws of thermodynamics
The corollary to law #2 is that since no real process is perfectly reversible, change in entropy of the universe is always positive, correct? But why can no real process be completely reversible?
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Re: Laws of thermodynamics
1. States that the total energy of the universe is constant.
2. States that in all spontaneous processes the entropy increases.
3. States that for a pure crystalline substance at 0 K the entropy is zero.
2. States that in all spontaneous processes the entropy increases.
3. States that for a pure crystalline substance at 0 K the entropy is zero.
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Re: Laws of thermodynamics
1) Energy cannot be created or destroyed
2) Universe works to increase entropy
3) A pure crystalline substance at 0 kevlin has an entropy of zero.
2) Universe works to increase entropy
3) A pure crystalline substance at 0 kevlin has an entropy of zero.
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