Química Nova | |
Determinação da entalpia de vaporização de líquidos pelo método do isoteniscópio de Smith e Menzies | |
Adriana Passarella Gerola2  Lilian Somenci Peloi2  Noboru Hioka2  Ourides Santin Filho2  Lilian Akemi Kato1  | |
[1] ,Universidade Estadual de Maringá Centro de Ciências Exatas Departamento de QuímicaMaringá PR ,Brasil | |
关键词: enthalpy of vaporization; isoteniscope; organic compounds; | |
DOI : 10.1590/S0100-40422010000200043 | |
来源: SciELO | |
【 摘 要 】
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 ΔvH (and ΔvS) 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.
【 授权许可】
CC BY-NC
All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License
【 预 览 】
Files | Size | Format | View |
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RO202005130063129ZK.pdf | 394KB | download |