Determinação da entalpia de vaporização de líquidos pelo método do isoteniscópio de Smith e Menzies Determination of the enthalpy of vaporization of liquid compounds by the Smith Menzies (isoteniscope) method

Determinação da entalpia de vaporização de líquidos pelo método do isoteniscópio de Smith e Menzies Determination of the enthalpy of vaporization of liquid compounds by the Smith Menzies (isoteniscope) method

<abstract language="eng">This article proposes an experimental procedure to determine the enthalpy (and entropy) of vaporization of organic liquid compounds, by the Smith-Menzies (isoteniscope) method. The values of vapor pressure at different temperatures were obtained and &#916...

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Bibliographic Details
Main Authors: Adriana Passarella Gerola, Lilian Somenci Peloi, Noboru Hioka, Ourides Santin Filho, Lilian Akemi Kato
Format: Article
Language:English
Published: Sociedade Brasileira de Química 2010-01-01
Series:Química Nova
Subjects:
enthalpy of vaporization
isoteniscope
organic compounds
Online Access:http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422010000200043
Description
Summary:<abstract language="eng">This article proposes an experimental procedure to determine the enthalpy (and entropy) of vaporization of organic liquid compounds, by the Smith-Menzies (isoteniscope) method. The values of vapor pressure at different temperatures were obtained and &#916;vH (and &#916;vS) were graphically determined, using the Clausius-Clapeyron equation. The results for diethyl-ether, propanone, ethanol and n-hexane are in very good agreement with those from literature. A historical and thermodynamic discussion on equations that correlates vapor pressures and temperature precedes the experimental proposition.
ISSN:0100-4042
1678-7064

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