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Stability and tensile strength of liquids exhibiting density maxima
Author(s) -
Debenedetti P. G.,
D'Antonio M. C.
Publication year - 1988
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690340312
Subject(s) - maxima , maximum density , phase diagram , maxima and minima , thermodynamics , thermal expansion , critical point (mathematics) , phase boundary , chemistry , triple point , locus (genetics) , phase (matter) , physics , geometry , mathematics , mathematical analysis , art , biochemistry , organic chemistry , performance art , gene , art history
If a given liquid exhibits a density maximum anywhere in its phase diagram, thermodynamic consistency dictates that such a point cannot be isolated: a density maxima locus must necessarily exist. For a fluid that does not also exhibit density minima, the pressure‐temperature projection of such a locus is negatively sloped, and can only end at a stability limit. There exist two thermodynamically consistent ways in which such an intersection can occur, and they correspond, respectively, to the highest and lowest possible temperatures at which a liquid can exhibit a negative coefficient of thermal expansion. These theoretical predictions are confirmed by experimental observations. The existence of density anomalies anywhere in a liquid's phase diagram is shown to have a profound influence in determining the shape of such a fluid's stability boundary.