Thermodynamics Forum

Reversible processes do exist in nature. Light in a vacuum is a reversible process. It produces no entropy. It is perpetual until it is disturbed/absorbed. Because it is a process, it has more than one state: [Its displacement current creates light's magnetic vector which in turn creates the electrical vector, which creates the magnetic vector...] , it produces a work product: [the transport of electromagnetic energy in space/time].

The covalent bond is another. It produces no entropy. It too is perpetual untill disturbed. It has two states: the energy association with one then the other atom. It produces a work product: the union of two atoms.

I want you to know that the reversible process only exists in wave mechanics, and cannot have any mass particles within the process. Mass always has Heisenberg Uncertainty...which is entropy...and it is not permitted in a reversible process. I also want you to note…

"While differing widely in the various little bits we know, in our infinite ignorance we are all equal."

_ Karl Popper

The working principle of adsorption-desorption heat pumps with cyclic switching between adsorption and desorption is adapted in the proposed heat engine to generate electrical power from low-temperature heat.

Please, see attachment or web link: https://www.lidsen.com/journals/jept/jept-05-04-034

Mikhail

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__ Emilie du Chatelet

Hi, I noticed It was not easy to find a consistent calculator for specific heat ratio (adiabatic coefficient), so I created one. Check Adiacalc.com, and if you like it recommend it. It is also posted on github for the courious. It is completely functional for ideal gases and working on implementing real gases soon.

Carl Sagan, Cosmos