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  2. Irreversible process - Wikipedia

    en.wikipedia.org/wiki/Irreversible_process

    Applying chaos theory to the second law of thermodynamics, the paradox of irreversibility can be explained in the errors associated with scaling from microstates to macrostates and the degrees of freedom used when making experimental observations. Sensitivity to initial conditions relating to the system and its environment at the microstate ...

  3. Loschmidt's paradox - Wikipedia

    en.wikipedia.org/wiki/Loschmidt's_paradox

    In physics, Loschmidt's paradox (named for J.J. Loschmidt), also known as the reversibility paradox, irreversibility paradox, or Umkehreinwand (from German 'reversal objection'), [1] is the objection that it should not be possible to deduce an irreversible process from time-symmetric dynamics.

  4. Bejan number - Wikipedia

    en.wikipedia.org/wiki/Bejan_number

    In the field of thermodynamics the Bejan number is the ratio of heat transfer irreversibility to total irreversibility due to heat transfer and fluid friction: [1] [2] = ˙, ′ ˙, ′ + ˙, ′

  5. Laws of thermodynamics - Wikipedia

    en.wikipedia.org/wiki/Laws_of_thermodynamics

    The laws of thermodynamics are a set of scientific laws which define a group of ... A prime example of this irreversibility is the transfer of heat by conduction or ...

  6. Second law of thermodynamics - Wikipedia

    en.wikipedia.org/wiki/Second_law_of_thermodynamics

    The second law of thermodynamics is a physical law based on universal empirical observation concerning heat and energy interconversions.A simple statement of the law is that heat always flows spontaneously from hotter to colder regions of matter (or 'downhill' in terms of the temperature gradient).

  7. Thermodynamics - Wikipedia

    en.wikipedia.org/wiki/Thermodynamics

    Irreversibility; Endoreversibility; ... Thermodynamics is a branch of physics that deals with heat, ... It marked the start of thermodynamics as a modern science.

  8. Quantum thermodynamics - Wikipedia

    en.wikipedia.org/wiki/Quantum_thermodynamics

    The second law of thermodynamics is a statement on the irreversibility of dynamics or, the breakup of time reversal symmetry . This should be consistent with the empirical direct definition: heat will flow spontaneously from a hot source to a cold sink.

  9. Laplace's demon - Wikipedia

    en.wikipedia.org/wiki/Laplace's_demon

    In the history of science, Laplace's demon was a notable published articulation of causal determinism on a scientific basis by Pierre-Simon Laplace in 1814. [1] According to determinism, if someone (the demon) knows the precise location and momentum of every atom in the universe, their past and future values for any given time are entailed ...