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7: Conservation of Energy

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    • 7.1: Mechanics and the Mechanical Energy Balance
      Defining mechanical work and power, the work-energy principle, and the mechanical energy balance. Discussion of springs as a source of mechanical energy.
    • 7.2: Four Questions
      Four questions needed to develop an accounting concept for the property of energy: What is energy? How can it be stored in a system? How can it be created or destroyed? How can it be transported? Conservation of energy and the work-energy principle.
    • 7.3: Conservation of Energy
      Application of the conservation of energy principle to systems. Standard assumptions made about heat transfer and work in such applications. Includes multiple worked examples.
    • 7.4: Substance Models
      Equations of state for two simple substance models: the ideal gas model with room-temperature specific heats and incompressible substance model with room-temperature specific heats. Includes several worked examples.
    • 7.5: Flow Work and Flow Power Revisited
      More detailed explanation of flow work and flow power, in the case of systems with mass flow in/out and cases with multiple inlets/outlets.
    • 7.6: Work and Power Revisited
      Introduction to the concept of transferring energy through quasiequilibrium vs non-quasiequilibrium work.
    • 7.7: Heat Transfer Revisited
      Key concepts of heat transfer, including heat flux and the physical mechanisms (conduction, convection, and thermal radiation) by which heat transfer occurs.
    • 7.8: Electrical Energy Storage and Transfer
      Instantaneous and average electrical power, for DC systems. Average electrical power for steady-state AC systems. Storage of electrical energy in resistors, capacitors, inductors, and batteries.
    • 7.9: Thermodynamic Cycles
      Definition and classification of thermodynamic cycles. Discussion of power cycles, refrigeration cycles, and heat pumps, as well as their measures of performance.
    • 7.10: Problems

    This page titled 7: Conservation of Energy is shared under a CC BY-NC-SA 4.0 license and was authored, remixed, and/or curated by Donald E. Richards (Rose-Hulman Scholar) via source content that was edited to the style and standards of the LibreTexts platform; a detailed edit history is available upon request.