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Diversity and Entropy
Entropy 1999, 1(1), 4-8; doi:10.3390/e1010004
Communication

On the Sign of Local Temperature in Molecules

1,2
1 Department of Chemical Information Technology, Technical University of Budapest, Szt. Gellért tér 4, Budapest, H-1111, Hungary 2 Novartis Institute for Biomedical Research, 556 Morris Ave, Summit, NJ 07901, USA
Received: 26 February 1999 / Accepted: 24 March 1999 / Published: 26 March 1999
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Abstract

Lin proposed earlier based on qualitative considerations that electronic motion was associated with negative absolute temperature. Here, a local temperature formula is proposed for electronic motion in atoms and molecules, which allows the existence of negative absolute temperature in a local sense in thermodynamic equilibrium. The proposed temperature formula is a function of total energy density ε(r), entropy density s(r) and electron density ρ(r).
Keywords: negative absolute temperature; local temperature; entropy density; energy density; electron density negative absolute temperature; local temperature; entropy density; energy density; electron density
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Kolossváry, I. On the Sign of Local Temperature in Molecules. Entropy 1999, 1, 4-8.

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