'Entropy change' diaporamas de présentation

The T-dS Equations & Diagrams

The T-dS Equations & Diagrams. Meeting 9 Section 4-3 & 4-4. Second Law of Thermodynamics. This can be viewed as a mathematical statement of the second law (for a closed system). Entropy is a non-conserved property!. Entropy. Units are. s = S/m : intensive property.

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Chapter 8. THERMODYNAMICS: THE SECOND AND THIRD LAW

Chapter 8. THERMODYNAMICS: THE SECOND AND THIRD LAW. ENTROPY. 8.1 Spontaneous Change 8.2 Entropy and Disorder 8.3 Changes in Entropy 8.4 Entropy Changes Accompanying Changes in Physical State 8.5 A Molecular Interpretation of Entropy

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TRT 401 PHYSICAL CHEMISTRY

TRT 401 PHYSICAL CHEMISTRY. SECOND LAW. Second Law Thermodynamic. The direction of Spontaneous Change: The dispersal of energy Entropy Impact on engineering: refrigeration Entropy change accompanying specific processes. Concentrating on the system: The Helmholtz and Gibbs energies

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Cross-linked Polymers and Rubber Elasticity

Cross-linked Polymers and Rubber Elasticity. Definition. An elastomer is defined as a cross-linked amorphous polymer above its glass transition temperature. 1. Capability for instantaneous and extremely high extensibility

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Thermodynamics

Thermodynamics. Thermodynamics. 1- Spontaneous Processes 2- The Definition of Entropy 3- Entropy and Physical Changes 4- Entropy and the Second Law of Thermodynamics 5- The Effect of Temperature on Spontaneity 6- Free Energy 7- Entropy Changes in Chemical Reactions

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Chapter 16

Chapter 16. Thermodynamics: Entropy, Free Energy, and Equilibrium. 16.1 Spontaneous Processes. Spontaneous Process : A process that, once started, proceeds on its own without a continuous external influence. Will the reverse reaction spontaneous?. 16.1 Spontaneous process.

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The Second Law of Thermodynamics

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Spontaneity, entropy and free energy

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Review for Final

Review for Final. Physics 313 Professor Lee Carkner Lecture 25. Final Exam. Final is Tuesday, May 18, 9am 75 minutes worth of chapters 9-12 45 minutes worth of chapters 1-8 Same format as other tests (multiple choice and short answer) Worth 20% of grade

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The direction of Chemical Change

Chapter 17. The direction of Chemical Change. Direction of spontaneous change. If a process is found to be spontaneous, the reverse process is non spontaneous.

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Lecture 10: D G, Q, and K

Lecture 10: D G, Q, and K. Reading: Zumdahl 10.10, 10.11 Outline Relating D G to Q Relating D G to K The temperature dependence of K. Relating D G to Q. Recall from Lecture 6: D S = R ln ( W final / W initial ). For the expansion of a gas W final ? Volume.

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Lecture 10: D G, Q, and K

Lecture 10: D G, Q, and K. Reading: Zumdahl 10.10, 10.11 Outline Relating D G to Q Relating D G to K The temperature dependence of K. Relating D G to Q. Recall from Lecture 6: D S = R ln ( W final / W initial ). For the expansion of a gas W final ? Volume.

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Quantum Refrigeration & Absolute Zero Temperature

Quantum Refrigeration & Absolute Zero Temperature. Yair Rezek. Tova Feldmann Ronnie Kosloff. The Third Law of Thermodynamics. Heat Theorem : “The entropy change of any process becomes zero when the absolute zero temperature is approached”. Walter Nernst 1864-1941.

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Thermodynamic Potentials

Thermodynamic Potentials. Why are thermodynamic potentials useful. Consider U=U(T,V). Complete knowledge of equilibrium properties of a simple thermodynamic System requires in addition. P=P(T,V). equation of state. U=U(T,V) and P=P(T,V). complete knowledge of equilibrium properties.

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ENTHALPY, ENTROPY AND GIBBS FREE ENERGY

ENTHALPY, ENTROPY AND GIBBS FREE ENERGY. ENTHALPY . The heat change associated with a chemical process ? H o rxn = ? n ? H f o prod - ? n ?H f o react ? H rxn = negative Exothermic ? H rxn = positive Endothermic. Calculate the enthalpy change ( ?H)for the following reaction

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Chapter 19, Part III

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Gibbs Free Energy

Gibbs Free Energy. Unit 3 - Thermodynamics. Will a Reaction Occur?. Both enthalpy and entropy are factors in determining on whether or not a reaction will occur.

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Entropy

427 views • 8 slides