What is Exergy? | Learn About Energy & Its Variations

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Exergy is defined as the maximum work obtainable from a system as it reaches equilibrium with a heat reservoir, highlighting its significance in thermodynamics. It represents the useful energy available in a system, distinguishing it from total energy, which includes unusable energy. The concept is primarily applied in thermodynamic contexts, but it can also relate to other fields like engineering and environmental science. Understanding exergy helps in assessing energy efficiency and sustainability in various processes. Overall, exergy is crucial for evaluating how energy can be converted into work effectively.
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what exactly is exergy,my book says there is something called exergy like energy?
 
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Straight from wikipedia: "In thermodynamics, the exergy of a system is the maximum work possible during a process that brings the system into equilibrium with a heat reservoir."
 


so is the term used only with respect tom thermodynamics?
please elaborate equilibrium with heat reservoir
 
So I know that electrons are fundamental, there's no 'material' that makes them up, it's like talking about a colour itself rather than a car or a flower. Now protons and neutrons and quarks and whatever other stuff is there fundamentally, I want someone to kind of teach me these, I have a lot of questions that books might not give the answer in the way I understand. Thanks
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