Determination of the enthalpy of vaporization of liquid compounds by the Smith Menzies (isoteniscope) method

Química Nova

Santin Filho, Ourides¹  Gerola, Adriana Passarella¹  Peloi, Lilian Somenci¹  Hioka, Noboru¹  Universidade Estadual de Maringá, Maringá, Brasil¹  Kato, Lilian Akemi¹ 

关键词: enthalpy of vaporization;    isoteniscope;    organic compounds.;   

DOI  :  10.1590/S0100-40422010000200043

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 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】

Unknown