S Wikipedije, slobodne enciklopedije
U termodinamici, izentropski proces ili izoentropijski proces (ισον = "jednak" (grčki); εντροπία entropija = "nered"(grčki)) je proces u kojem se, u svrhu inženjerske analize i proračuna, može pretpostaviti da se proces odvija od početka do kraja bez porasta ili opadanja entropije sistema, tj., entropija sistema ostaje konstantna.[1][2] Može se dokazati da je bilo koji povratni adijabatski proces izentropski proces.
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dobiveno iz:
![{\displaystyle pV^{\gamma }={\text{konstanta}}\,\!}](http://178.128.105.246/content-https-wikimedia.org/api/rest_v1/media/math/render/svg/1b441c275dbe97997c223858abec9996aefed510)
![{\displaystyle pV=mR_{s}T\,\!}](http://178.128.105.246/content-https-wikimedia.org/api/rest_v1/media/math/render/svg/986e85ab384c3db211c2591f4ac49e0c7f1ade9e)
![{\displaystyle p=\rho R_{s}T\,\!\,\!}](http://178.128.105.246/content-https-wikimedia.org/api/rest_v1/media/math/render/svg/492074f15e2756f06af909ced74c0bd964fbda4a)
- gdje je:
= pritisak
= zapremina
= omjer specifičnih toplota = ![{\displaystyle C_{p}/C_{v}\,\!}](http://178.128.105.246/content-https-wikimedia.org/api/rest_v1/media/math/render/svg/6c00a8603b695d68d78e8c136e7dc10cd2fa0a03)
= temperatura
= masa
= plinska konstanta specifičnog plina = ![{\displaystyle R/M\,\!}](http://178.128.105.246/content-https-wikimedia.org/api/rest_v1/media/math/render/svg/f26a1550b2e1d470b08a172de316051be8587b1a)
= univerzalna plinska konstanta
= molekularna masa specifičnog plina
= gustoća
= specifična toplota pri konstantnom pritisku
= specifična toplota pri konstantnoj zapremini
- Van Wylen, G.J. and Sonntag, R.E. (1965), Fundamentals of Classical Thermodynamics, John Wiley & Sons, Inc., New York. Library of Congress Calatog Card Number: 65-19470
- ^ Van Wylen, G.J. and Sonntag, R.E., Fundamentals of Classical Thermodynamics, Section 7.4
- ^ Massey, B.S. (1970), Mechanics of Fluids, Section 12.2 (2nd edition) Van Nostrand Reinhold Company, London. Library of Congress Catalog Card Number: 67-25005