Expansivity of liquid (cyclohexane + acetic anhydride) near its critical solution point

Nagarajan, N and Tiwari, MK and Jyothi, S and Shetty, Chandrashekhar and Kumar, Anil and Gopal, ESR (1980) Expansivity of liquid (cyclohexane + acetic anhydride) near its critical solution point. In: The Journal of Chemical Thermodynamics, 12 (10). pp. 907-918.

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Abstract

A simple volume dilatometer is described for the precise measurements of volume changes as a function of temperature in liquid mixtures. The expansivity of (cyclohexane + acetic anhydride) in the critical region was measured. The critical solution temperature Tc was approached to within 9 mK. For T > (Tc + 0.3 K), the results results follow both a logarithmic and a power-law behaviour with an exponent ≈ 1/8. But for T < (Tc + 0.3 K), the results seem to be affected possibly by gravity or temperature gradients. In this region, the expected expansivity anomaly is rounded off to a cusp. The expansivity shows a reduced anomaly for off-critical compositions. A discussion of the local extremum and a correlation between negative expansivity and the resistivity anomaly are also given.

Item Type:	Journal Article
Publication:	The Journal of Chemical Thermodynamics
Publisher:	Elsevier Science
Additional Information:	Copyright of this article belongs to Elsevier Science.
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	19 Jul 2009 04:59
Last Modified:	19 Sep 2010 05:32
URI:	http://eprints.iisc.ac.in/id/eprint/20386

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