Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.14/6752
Título: Understanding the thermodynamics of equilibria across semipermeable membranes
Autor: Ferreira, João Paulo Medeiros
Data: 2005
Editora: TCE
Citação: "The Chemical Educator". ISSN 1430-4171. 10:10 (2005) 1-5
Resumo: Osmotic equilibrium is ubiquitous in biological systems and it also underlies a number of technological processes, such as reverse osmosis. Quite often, students know how to calculate osmotic pressures in ideal diluted solutions, but they do not have a deep understanding of the driving forces for transport and how these relate to thermodynamic variables. This article derives, in is simple and straightforward way, the conditions for equilibria through selective membranes, starting with ideal gas mixtures. Chang with physical conditions of several thermodynamic properties are evaluated.Then, the analysis is extended to ideal liquid mixtures, pointing out the similarities and difterences with the previous situation. an expression for the reversible work associated with a change in concentration is derived, and it is applied to the process of desalination of seawater
Peer review: yes
URI: http://hdl.handle.net/10400.14/6752
Versão do Editor: The original publication is available at www.springerlink.com
Aparece nas colecções:ESB - Artigos em revistas internacionais com Arbitragem / Papers in international journals with Peer-review



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