Lecture 12

Lecture 12 - Chem 338 The Third Law: Zero Kelvin 1. Nernst:...

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Chem 338 0 : ( ) is independent of path dS S T = v C h em 3 3 8 L e c t u r e 1 2 The Third Law: Zero Kelvin 1. Nernst: Δ S 0 = 0 Postulate Planck: S 0 = k B ln 1 = 0 Conclusion! 2. Thermodynamic Absolute Entropy: 3. Statistical Mechanics Absolute Entropy: 4. Quantum Mechanics: ab initio Entropy 5. Influence of Mass & Structure. 6. Carbon Monoxide, C ≡Ο : S 0 0 ? 7. 0 (' ) ' () ' T CT P T ST dT = ⎡⎤ ⎣⎦ , ln l n BB NV Q k Q kT T ⎛⎞ =+ ⎜⎟ ⎝⎠
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Chem 338 2. Thermodynamic Absolute Entropy: 0 (' ) ' () ' T CT P T ST dT = ⎡⎤ ⎣⎦
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Chem 338 0 : ( ) is independent of path dS S T = v
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Chem 338 0 (' ) ' () ' T CT P T ST dT = ⎡⎤ ⎣⎦
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Chem 338 3. Statistical Mechanics Absolute Entropy: Pdv part of C p , ln () l n BB NV Q ST k Q kT T ⎛⎞ =+ ⎜⎟ ⎝⎠
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Chem 338 BB B qq SN k N k N k T NT ⎛⎞ =+ + ⎜⎟ ⎝⎠ ln ln T
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Chem 338 32 2 2 3 1 2 2 2 1 / BB rot A B B Mk T V T qq SN k N ranslatio kN k T NT Sq q n N T h RN T S R T σ π ⎛⎞ =+ + ⎜⎟ ⎡⎤ ++ ⎢⎥ ⎝⎠ + + + = ⎣⎦ Θ ln
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This note was uploaded on 06/28/2010 for the course CHEM 338 taught by Professor Petersson during the Spring '10 term at Wesleyan.

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Lecture 12 - Chem 338 The Third Law: Zero Kelvin 1. Nernst:...

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