Di Liberto, Francesco (2008) Produzione di entropia e Lavoro perduto in un semplice processo irreversibile. [Pubblicazione in rivista scientifica]

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Item Type: Pubblicazione in rivista scientifica
Title: Produzione di entropia e Lavoro perduto in un semplice processo irreversibile
Creators:
CreatorsEmail
Di Liberto, Francescodiliberto@na.infn.it
Date: January 2008
Official URL: http://paperseek.sif.it/index.php?journal=gdf&issu...
Journal or Publication Title: Giornale di fisica
Date: January 2008
ISSN: 0017-0283
Volume: XLIX
Number: 1
Page Range: pp. 3-14
Uncontrolled Keywords: Irreversibilità, Entropia, Energia dissipata
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MIUR S.S.D.: Area 02 - Scienze fisiche > FIS/02 - Fisica teorica, modelli e metodi matematici
Area 02 - Scienze fisiche > FIS/08 - Didattica e storia della fisica
Additional Information: The original publication is available at http://www.sif.it/SIF/en/portal/journals
Date Deposited: 01 Oct 2009 08:57
Last Modified: 30 Apr 2014 19:35
URI: http://www.fedoa.unina.it/id/eprint/3018

Abstract

[ITALIANO] Nei processi irreversibili c’è produzione di entropia, π , ed energia dissipata (o Lavoro perduto) Lost W. In questo articolo, si analizza la relazione tra queste quantità relativamente al passaggio spontaneo di calore tra una sorgente calda 1 T ed una fredda 2 T. Viene mostrato che si possono definire diversi Lost W. Il più grande dei quali è per noi il giusto Lost W. Viene anche mostrato che lo stesso accade per le macchine termiche irreversibili e per trasformazioni meno semplici come l’espansione adiabatica irreversibile di un gas ideale. / [ENGLISH] In the irreversible processes there is entropy production, π and dissipated energy (or lost Work), Lost W. In this paper we analyse the relation between such quantities for the irreversible process in which some heat flows spontaneously from an hot heat source 1 T to a colder one 2 T. We show that one can define different lost works. The biggest is for us the true Lost Work. It is also shown that the same happens for the irreversible heat engines and for some complex process like the irreversible adiabatic expansion of an ideal gas.

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