Issue |
Europhys. Lett.
Volume 70, Number 4, May 2005
|
|
---|---|---|
Page(s) | 446 - 451 | |
Section | General | |
DOI | https://doi.org/10.1209/epl/i2004-10508-7 | |
Published online | 13 April 2005 |
Positive and negative entropy production in an ideal-gas expansion
Escuela de Ingeniería Química, Facultad de Ingeniería, Universidad de los Andes Mérida, Venezuela
Received:
22
September
2004
Accepted:
23
March
2005
A theoretical thermodynamic analysis shows that an irreversible isothermal expansion of an ideal gas in a cylinder equipped with a piston may occur through trajectories involving a simultaneous positive and negative entropy production. Under these trajectories the operation is more efficient than a reversible expansion between the same initial and final states. This unexpected behavior may be explained as a consequence of an entropy coupling between the simultaneous positive and negative entropy production processes.
PACS: 05.70.Ce – Thermodynamic functions and equations of state / 05.70.Ln – Nonequilibrium and irreversible thermodynamics / 65.40.Gr – Entropy and other thermodynamical quantities
© EDP Sciences, 2005
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