Critical behavior of static properties for nitrobenzene-alkane mixtures
authors Perez-Sanchez, G; Losada-Perez, P; Cerdeirina, CA; Thoen, J
nationality International
journal JOURNAL OF CHEMICAL PHYSICS
author keywords critical points; mixtures; organic compounds; specific heat
keywords CRITICAL REGION; COEXISTENCE CURVES; HEAT-CAPACITY; CRITICAL-POINT; BINARY-MIXTURE; TURBIDITY MEASUREMENTS; CORRELATION LENGTH; N-ALKANES; LIQUIDS; SYSTEMS
abstract We present experimental data of the isobaric heat capacity per unit volume Cp,xV-1 for mixtures containing nitrobenzene and an alkane (CNH2N+2, with N ranging from 6 to 15) upon approaching their liquid-liquid critical points along a path of constant composition. Values for the critical amplitude A(+) have been determined. They have been combined with the previously reported ones for the leading term of the coexistence-curve width to obtain, with the aid of well-known universal relations, the critical amplitudes of the correlation length and of the osmotic susceptibility. The trends of all these critical parameters, which exhibit anomalous behavior in the low N region, are discussed in terms of particular microscopic phenomena characterizing NB-CNH2N+2 mixtures. The work is completed with an analysis of the analog of the Yang-Yang anomaly in liquid-liquid criticality: the behavior of the partial molar heat capacities of the two liquid components is found to illustrate previously uncovered asymmetry effects. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3431547]
publisher AMER INST PHYSICS
issn 0021-9606
year published 2010
volume 132
issue 21
digital object identifier (doi) 10.1063/1.3431547
web of science category Chemistry, Physical; Physics, Atomic, Molecular & Chemical
subject category Chemistry; Physics
unique article identifier WOS:000278511900019
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journal impact factor 2.843
5 year journal impact factor 2.743
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