# 8: Entropy Production and Accounting

- Page ID
- 81509

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- 8.1: Four Questions
- Four basic questions about entropy: what it is, how it can be stored in a system, how it can be transported, and how it can be created or destroyed. Putting this information together to develop the entropy accounting equation.

- 8.2: Empirical and Thermodynamic Temperature
- Defining empirical temperature and thermodynamic temperature. The concept of a thermodynamic temperature scale, and conversions between empirical and thermodynamic temperature scales.

- 8.3: Entropy Accounting Equation
- Applying the entropy accounting equation to different types of systems. Assumptions typically made regarding system models, heat and work transfer of entropy, and substance models. Includes several worked examples.

- 8.4: Thermodynamic Cycles, Revisited
- Evaluating the performance of thermodynamic cycles (power cycles, refrigeration cycles, and heat pump cycles) using the entropy accounting equation.

- 8.5: Entropy and the Substance Models
- Relating changes in specific entropy to other specific properties, in the ideal gas model and the incompressible substance model. Includes several worked examples.