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An irreversible process is a [[thermodynamic]] process that results in an increase in [[entropy]]. Examples include the puncturing of a tire or the melting of ice.

An '''irreversible process''' is a process in which it is impossible to return both the system and its surroundings to its original state by reversing from process.  For instance, a combustion engine transforms gasoline into engine exhaust and energy; however, no process can turn the engine exhaust and the energy transfered to the car cannot be transformed back into gasoline.  Irreversible processes generally involve an increase in [[entropy]].

 

Causes of irreversible processes include friction, unrestrained fluid expansion, heat transfer, and mixing.

[[category:physics]]

[[category:physics]]