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Definition of Irreversible change

Irreversible change Definition from Science & Technology Dictionaries & Glossaries
A change from one thermodyanamic state to another along a path which cannot be constructed by a series of infinitesimal steps, each of which is reversible. A typical irreversible change is a spontaneous one in nature; for example, rapid expansion of a gas.
Irreversible change Definition from Encyclopedia Dictionaries & Glossaries
English Wikipedia - The Free Encyclopedia
In science, a process that is not reversible is called irreversible. This concept arises most frequently in thermodynamics.

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Reversibility can refer to:
  • Time reversibility, a property of some mathematical or physical processes and systems for which time-reversed dynamics are well defined
  • Reversible diffusion, an example of a reversible stochastic process
  • Reversible process (thermodynamics), a process or cycle such that the net change at each stage in the combined entropy of the system and its surroundings is zero
  • Reversible reaction, a chemical reaction for which the position of the chemical equilibrium is very sensitive to the imposed physical conditions; so the reaction can be made to run either forwards or in reverse by changing those conditions
  • Reversible computing, logical reversibility of a computation - a computational step for which a well-defined inverse exists
  • Reversible error, a legal mistake invalidating a trial
  • Reversible garment, a garment that can be worn two ways
  • Piaget's theory of cognitive development, in which mental reversibility is part of the concrete operational stage, the understanding that numbers and objects can change and then return to their original state
  • Tesla principle, now known as a reversible process in engineering, a process of a system such that a net reverse in operation will accomplish the converse of the original function

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