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MIT OpenCourseWare

Definition of Heat Interaction and Thermodynamic Efficiencies - Lecture 5

MIT OpenCourseWare via YouTube

Overview

Explore advanced thermodynamics concepts in this 94-minute lecture focusing on heat interaction definitions and efficiency calculations. Delve into detailed explanations of work and non-work interactions, heat transfer principles, and the behavior of systems between thermal reservoirs. Learn about the operational principles of heat engines, refrigeration units, and heat pumps, along with their first and second law efficiencies. Master key concepts including stable equilibrium properties, temperature measurement, pressure systems, heat capacities, and the relationships between thermodynamic variables. Examine practical applications through discussions of thermometers, manometers, and the distinction between pressure and force per unit area. Conclude with an understanding of fundamental relations, Gibbs free energy, chemical potentials, and Legendre transformations. The instructor recommends viewing at 1.5x speed for optimal learning efficiency.

Syllabus

- Introduction
- Review: a More Precise Clausius Inequality
- Types of Interactions Between System
- Definition of Work Interaction
- Definition of Non-Work Interaction
- Definition of Heat Interaction
- Our Definition of Heat versus Heat Transfer
- Steady State Heat Transfer Requires Nonequilibrium
- Energy and Entropy Exchanges Between Reservoirs
- Interposing a System Makes Reversibility Possible
- Heat Engine Between Two Thermal Reservoirs
- Refrigerator Between Two Thermal Reservoirs
- Heat Pump Between Two Thermal Reservoirs
- Measurements of Stable-Equilibrium Properties
- Thermometer
- Manometer
- Pressure vs Force per Unit Area
- Heat Capacities
- Enthalpy and Heat Capacity at Constant Pressure
- Heat Capacity at Constant Volume
- Equation of State
- Mayer Relation, Sound Speed, Etc
- Gibbs Free Energy and Chemical Potentials
- Partial Pressures and Chemical Potentials
- Summary of Properties
- Fundamental Relation from Measurements
- Changing Variables by Means of Legendre Transform

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MIT OpenCourseWare

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