Vapor Pressure, Vaporization Enthalpy, Standard Enthalpy of Formation and Standard Entropy of n-Butyl Carbamate

doi:10.1016/j.cjche.2014.08.003

›› 2014, Vol. 22 ›› Issue (10): 1145-1152.DOI: 10.1016/j.cjche.2014.08.003

Vapor Pressure, Vaporization Enthalpy, Standard Enthalpy of Formation and Standard Entropy of n-Butyl Carbamate

Zuoxiang Zeng, Zhihong Yang, Weilan Xue, Xiaonan Li

Institute of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China

收稿日期:2013-03-25 修回日期:2013-07-08 出版日期:2014-10-28 发布日期:2014-12-01
通讯作者: Zuoxiang Zeng, Weilan Xue

Vapor Pressure, Vaporization Enthalpy, Standard Enthalpy of Formation and Standard Entropy of n-Butyl Carbamate

Zuoxiang Zeng, Zhihong Yang, Weilan Xue, Xiaonan Li

Institute of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China

Received:2013-03-25 Revised:2013-07-08 Online:2014-10-28 Published:2014-12-01

摘要/Abstract

摘要： The vapor pressures of n-butyl carbamate were measured in the temperature range from 372.37 K to 479.27 K and fitted with Antoine equation. The compressibility factor of the vapor was calculated with the Virial equation and the second virial coefficient was determined by the Vetere model. Then the standard enthalpy of vaporization for n-butyl carbamate was estimated. The heat capacity was measured for the solid state (299.39-324.2 K) and liquid state (336.65-453.21 K) by means of adiabatic calorimeter. The standard enthalpy of formation Δ_fH^ϴ[crystal (cr),298.15 K] and standard entropy S^ϴ(crystal,298.15 K) of the substance were calculated on the basis of the gas-phase standard enthalpy of formation Δ_fH^ϴ(g,298.15 K) and gas-phase standard entropy S^ϴ(g,298.15 K), which were estimated by the Bensonmethod. The results are acceptable, validated by a thermochemical cycle.

关键词: n-Butyl carbamate, Vapor pressure, Standard enthalpy of formation, Standard entropy

Abstract: The vapor pressures of n-butyl carbamate were measured in the temperature range from 372.37 K to 479.27 K and fitted with Antoine equation. The compressibility factor of the vapor was calculated with the Virial equation and the second virial coefficient was determined by the Vetere model. Then the standard enthalpy of vaporization for n-butyl carbamate was estimated. The heat capacity was measured for the solid state (299.39-324.2 K) and liquid state (336.65-453.21 K) by means of adiabatic calorimeter. The standard enthalpy of formation Δ_fH^ϴ[crystal (cr),298.15 K] and standard entropy S^ϴ(crystal,298.15 K) of the substance were calculated on the basis of the gas-phase standard enthalpy of formation Δ_fH^ϴ(g,298.15 K) and gas-phase standard entropy S^ϴ(g,298.15 K), which were estimated by the Bensonmethod. The results are acceptable, validated by a thermochemical cycle.

Key words: n-Butyl carbamate, Vapor pressure, Standard enthalpy of formation, Standard entropy

Zuoxiang Zeng, Zhihong Yang, Weilan Xue, Xiaonan Li. Vapor Pressure, Vaporization Enthalpy, Standard Enthalpy of Formation and Standard Entropy of n-Butyl Carbamate[J]. , 2014, 22(10): 1145-1152.

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Vapor Pressure, Vaporization Enthalpy, Standard Enthalpy of Formation and Standard Entropy of n-Butyl Carbamate

Vapor Pressure, Vaporization Enthalpy, Standard Enthalpy of Formation and Standard Entropy of n-Butyl Carbamate

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