Autores
Ferreira, João Paulo Medeiros
Orientador(es)
Resumo(s)
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
Descrição
Palavras-chave
Contexto Educativo
Citação
"The Chemical Educator". ISSN 1430-4171. 10:10 (2005) 1-5