# TAILIEUCHUNG - Lecture Companion site to accompany thermodynamics: An engineering approach (7/e): Chapter 12 - Yunus Çengel, Michael A. Boles

## Chapter 12 - Thermodynamic property relations. This chapter develop fundamental relations between commonly encountered thermodynamic properties and express the properties that cannot be measured directly in terms of easily measurable properties. This chapter also review and use partial derivatives in the development of thermodynamic property relations. | Chapter 12 Thermodynamic Property Relations Study Guide in PowerPoint to accompany Thermodynamics: An Engineering Approach, 7th edition by Yunus A. Çengel and Michael A. Boles Some thermodynamic properties can be measured directly, but many others cannot. Therefore, it is necessary to develop some relations between these two groups so that the properties that cannot be measured directly can be evaluated. The derivations are based on the fact that properties are point functions, and the state of a simple, compressible system is completely spec­ified by any two independent, intensive properties. Some Mathematical Preliminaries Thermodynamic properties are continuous point functions and have exact differentials. A property of a single component system may be written as general mathematical function z = z(x,y). For instance, this function may be the pressure P = P(T,v). The total differential of z is written as where Taking the partial derivative of M with .

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