L25_Thermo4

L25_Thermo4 - "Nature Girls (Jumping Janes)" by...

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“Nature Girls (Jumping Janes)” by Martha Rosler - High Entropy “Transformer” by Kaharina Sieverding - Low Entropy MOCA Geffen Contemporary exhibition
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Second Law of Thermodynamics In any spontaneous process the entropy of the universe must increase Universe= system + surroundings Microscopic perspective: entropy is related to the number of microstates (positional and energy) by the Boltzmann formula. Macroscopic perspective: Entropy and heat Q. 0 > Δ + Δ = Δ sur sys S S S System
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Entropy and heat: = Δ f i r T dQ S Ω = ln b k S Entropy and disorder: Exothermic: heat out (-), entropy decreases Endothermic: heat in (+), entropy increases Entropy is a state function ( Δ S if depend only on the initial and final states) Entropy is additive: S AB =S A +S B i f
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2 ln V V nR S = Δ Entropy change for isothermal gas expansion from V 1 to V 2 : the above expression is valid for any isothermal gas expansion, not only for the reversible process, because entropy is state function Note:
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L25_Thermo4 - "Nature Girls (Jumping Janes)" by...

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