Jayalakshmi, V and Guha, S and Gopal, ESR (1989) Electrical and Dielectric Behaviour at the Critical Point of Binary Liquids: Acetonitrile + Cyclohexane. In: Berichte der Bunsen-Gesellschaft für Physikalische Chemie, 93 (4). pp. 513-520.
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The electrical capacitance and resistance of the binary liquid mixture cyclohexane + acetonitrile are measured in the one phase and two phase regions at spot frequencies between 5 kHz and 100 kHz. This sample has a very low gravity affected (∼0.6 mK) region. In one phase region the capacitance data show a sharp, ∼0.7% increase above background within 0.5 degrees of Tc whereas the resistance has a smooth increase of ∼1.5% above background in a (T−Tc) range of 4 degrees. Two phase values of capacitance and resistance from the coexisting phases are used to determine the critical parameters Tc (critical temperature), Rc (resistance at Tc) and Cc (capacitance at Tc). A precise knowledge of these parameters reduces the uncertainty on the critical exponent 0 for C and R. The one phase capacitance data fit to an (1 - α) exponent in a limited temperature range of 0.2 degrees. Resistance data strongly support an (1 - α) exponent over the entire 5 degree range.
| Item Type: | Journal Article |
|---|---|
| Publication: | Berichte der Bunsen-Gesellschaft für Physikalische Chemie |
| Publisher: | VCH Publishers inc |
| Additional Information: | Copyright of this article belongs to VCH Publishers inc. |
| Keywords: | Critical Phenomena;Electrical Properties;Liquids;Phase Transitions;Transport Properties. |
| Department/Centre: | Division of Physical & Mathematical Sciences > Physics |
| Date Deposited: | 25 Aug 2010 06:13 |
| Last Modified: | 25 Aug 2010 06:13 |
| URI: | http://eprints.iisc.ac.in/id/eprint/31374 |
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