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Thermodynamics explores the transformations of energy, focusing primarily on heat and mechanical work and their connections to the properties of matter. Key topics include temperature, heat, thermal expansion, the first and second laws of thermodynamics, and the Zeroth Law. The Zeroth Law establishes thermal equilibrium among bodies with the same temperature. This study also involves the various temperature scales: Celsius, Fahrenheit, and Kelvin. By understanding these concepts, one can grasp the fundamental principles governing energy interactions in physical systems.
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Thermodynamics Created by: Marlon Flores Sacedon Physics section, DMPS June 2010
Thermodynamics is a study energy transformations involving heat, mechanical work, and other aspects of energy and how these transformations relate to the properties of matter. • Topics: • Temperature and heat • Thermal Expansion • Heat Quantities • Equation of State • First Law of Thermodynamics • Second Law of Thermodynamics
Temperature and Heat • Temperature is rooted in qualitative ideas of “hot” and “cold” based on our sense of touch. • A body that feels hot usually has a higher temperature than a similar body that feels cold.
If C is initially in thermal equilibrium with both A and B, then A and B are also in thermal equilibrium with each other. This result is called the Zeroth Law of thermodynamics Two system are in thermal equilibrium if and only if they have the same temperature. Zeroth Law of Thermodynamics
Temperature scale TF 212 oF 32 oF TC 0 100 oC
Temperature scale • Instantaneous Temperature, (T) • Degree celsius, (oC) • Degree Fahrenheit (oF) • Change in Temperature, (∆T) • Degree celsius, (Co) • Degree Fahrenheit (Fo) • Kelvin (K)
Problems 1. a) -81oF, b) 134.1oF, c) 88oF 2. a) 104.4oF;yes, b) 54oF
Problems 3.
