Residual Entropy, the Third Law and Latent Heat

Entropy

Evguenii Kozliak¹ 

[1] Department of Chemistry, University of North Dakota, Grand Forks, ND 58202, USA

关键词: Configurational entropy;    residual entropy;    entropy of mixing;    thermodynamics;   

DOI  :  10.3390/e10030274

来源: mdpi

【 摘 要 】

A novel thermodynamic treatment of residual entropy in crystals, involving the configurational partition function, is suggested, which is consistent with both classical and statistical thermodynamics. It relates residual entropy to the inherent latent heat which would be released upon cooling if the reversible path were available. The nature of this heat is that if the crystal possessing residual entropy freezes above its Boltzmann’s characteristic temperature of molecular alignment, the difference in energy between different molecular arrangements is overcome by the kT heat bath to form a nearly-ideal solution. However, upon cooling below this characteristic temperature, they would separate with a concomitant release of the corresponding energy, provided the reversible path were available.

【 授权许可】

CC BY   
© 2008 by the authors; licensee Molecular Diversity Preservation International, Basel, Switzerland.