# Density inversion in the binary liquid system cyclohexane + aceto nitrile. Effects of doping and simplified models of the phenomena

Gopal, Ravi B and Vani, VC and Guha, S and Gopal, ESR (1991) Density inversion in the binary liquid system cyclohexane + aceto nitrile. Effects of doping and simplified models of the phenomena. In: Journal de Physique III, 1 (4). pp. 639-650.

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## Abstract

The binary liquid system acetonitrile + cyclohexane has closely matched densities, equal to within 0.2% at 20 °C, a density inversion in the system at ; $\simeq\hspace{2mm} 32^oC$ and a critical solution temperature off $\simeq\hspace{2mm}76^oC$. It is thus an excellent system for simulating buoyancy corrected microgravity in the laboratory. The changes of the density inversion temperature ti caused by doping with water soluble in acetonitrile only and acetic anhydride soluble in both liquids has been studied experimentally $dt_i/dX$ is equal to $1.7\hspace{2mm}\pm\hspace{2mm}0.1$ mK/ppm weight fraction of water with respect to acetonitrile and is $1.0\hspace{2mm}\pm\hspace{2mm}0.1$ mK/ppm weight fraction of acetic anhydride with respect to acetonitrile. Simplified models of the phenomena are presented for each case of doping.

Item Type: Journal Article Copyright of this article belongs to EDP Sciences. Density of liquids;Liquid mixtures;Organic compounds Division of Physical & Mathematical Sciences > Instrumentation and Applied Physics (Formally ISU)Division of Physical & Mathematical Sciences > Physics 19 Feb 2007 19 Sep 2010 04:32 http://eprints.iisc.ernet.in/id/eprint/8767