Can experiments select the configurational component of excess entropy?
Eur Phys J E Soft Matter
; 14(2): 143-7, 2004 Jun.
Article
in En
| MEDLINE
| ID: mdl-15254834
Configurational entropy is frequently used to rationalize the structural dynamics of glass-forming liquids. The main problem with this concept is that it is not directly accessible to experiments. We introduce a procedure to estimate the configurational component of the excess entropy of a liquid --specifically, the configurational-entropy contribution from the structural relaxation process-- through a combined investigation of dynamic and thermodynamic properties as functions of temperature and pressure. We test our method on orthoterphenyl, salol, and glycerol, and find that the fraction of excess entropy that arises from structural configurations is about 70% for all three materials.
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Collection:
01-internacional
Database:
MEDLINE
Language:
En
Journal:
Eur Phys J E Soft Matter
Journal subject:
BIOFISICA
Year:
2004
Document type:
Article
Affiliation country:
Italy
Country of publication:
France