Original scientific paper

https://doi.org/10.7906/indecs.11.1.14

About Defining the Referent Thermal Scale Points

Josip Stepanić orcid.org/0000-0003-0674-9883 ; Faculty of Mechanical Engineering and Naval Architecture – University of Zagreb

Abstract

The absolute temperature T has a recognized physical meaning in equilibrium thermodynamics. The scale realized by the closely related Lagrange coefficient  usually figures as an auxiliary scale. In this article, the scale spanned by  is a proper intensive thermal quantity for equilibrium and, suitably generalized, for stationary non-equilibrium state description. The coefficient  measures a relative deviation of a system state from the state of uniform distribution function. The cause of deviation is coupling to environment, which is realized as a net energy transfer and which ceases in the  = 0 state. A canonical ensemble of two level atoms coupled to electromagnetic quasi-continuum is considered as an example. The proposed and the usual interpretations of  are applied to stationary states of the same system, in which case the notion of the generalized absolute temperature is introduced. The generalized absolute temperature is a measure of a deviation of a system state from a state of infinitely intense external influence.

Keywords

non-equilibrium thermodynamics; equilibrium; Lagrange coefficient

Hrčak ID:

96065

URI

https://hrcak.srce.hr/96065

Publication date:

31.1.2013.

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