Authors: Juan Ramón González Álvarez
A new definition of heat for open systems, with a number of advantages over previous definitions, was introduced in [2013}; Int. J. Therm., 16(3), 102--108]. We extend the previous work by analyzing the production of entropy and showing that the new definition of heat appears naturally as the proper flow [«flux density»] conjugate to the gradient of temperature, with the previous definitions only considering a subset of the physical effects associated to this gradient. We also revisit the transfer of heat in multicomponent systems, confirming the identity derived in the previous work for the identification of thermal effects associated to each one of the chemical potentials in the system. The new definition of heat was previously obtained within the scope of the traditional thermodynamics of irreversible processes (TIP), which has a limited field of applicability to macroscopic systems with no too strong gradients and not too fast processes. We extend now the new definition of heat to more general situations and to the quantum level of description using a standard non-commutative phase space, with the former TIP-level definition recovered from partial integration.
Comments: 7 Pages.
[v1] 2015-10-01 06:18:12
Unique-IP document downloads: 53 times
Vixra.org is a pre-print repository rather than a journal. Articles hosted may not yet have been verified by peer-review and should be treated as preliminary. In particular, anything that appears to include financial or legal advice or proposed medical treatments should be treated with due caution. Vixra.org will not be responsible for any consequences of actions that result from any form of use of any documents on this website.
Add your own feedback and questions here:
You are equally welcome to be positive or negative about any paper but please be polite. If you are being critical you must mention at least one specific error, otherwise your comment will be deleted as unhelpful.