New Method to Determine Latent Heat of Liquids by Means of Dielectric Data

[+] Author and Article Information
W. Leidenfrost

School of Mechanical Engineering, Purdue University, West Lafayette, Ind.

J. Heat Transfer 97(1), 99-103 (Feb 01, 1975) (5 pages) doi:10.1115/1.3450297 History: Received May 02, 1974; Online August 11, 2010


A new method to determine heat of vaporization by means of dielectric data is described which allows one to obtain specific volumes introduced into Clausius-Clapeyron’s equation. Isochoric observations are not needed in most cases. An instrument is described for the observation of dielectric data, vapor pressure curve, p-T relationships in superheated state and also molecular weight and polarizability. The measurements to be performed are listed. The validity of the method is checked by using data observed in a similar instrument. The latent heat obtained by the new method is in excellent agreement with literature data. The new method, therefore, can be used advantageously to determine, in not too elaborate test equipment, latent heat, and other properties easily, quickly, and reliably.

Copyright © 1975 by ASME
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