ENTROPIYa

ENTROPIYa (az yun. entropia — gapdish, tabdilot), funksiyai holati sistemai termodinamikiro guyand (Odatan bo S ishorat meshavad) Tagyiroti E. (dS) dar jarayoni muntazam ba nisbati miqdori garmii (dQ) az sistema khorijshuda yo ba sistema dokhilshuda bar harorati termodinamikii (T) sistema barobar ast. Jarayonhoi nomuntazam dar sistemahoi izolyasiyashuda bo ziyod shudani E. surat girifta sistemaro ba kholati muntazam meorand va E. ba qimati kalontarinash sohib meshavad. Mafhumi E-ro s. 1865 R. Klauzius jori kardaast. Dar fizikai statisti E. hamchun meyori ehtimoliyati dar holati dodashuda voqe budani sistema muoina meshavad (prinsipi Bolsman). Mafhumi E. dar fizika, khimiya, biologiya va nazariyai informasiya mamul ast.