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单甲脒饱和蒸气压的测定和估算

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莫汉宏, 杨克武, 安凤春, 张晓辉. 单甲脒饱和蒸气压的测定和估算[J]. 环境化学, 1998, 17(1): 50-54.
引用本文: 莫汉宏, 杨克武, 安凤春, 张晓辉. 单甲脒饱和蒸气压的测定和估算[J]. 环境化学, 1998, 17(1): 50-54.
shu
Zhang Xiaohui, Mo Hanhong, Yang Kewu, An Fengchun. THE MEASUREMENT AND ESTIMATION OF THE VAPOR PRESSURE OF PESTICIDE N'-(2,4-DIMETHYLPHENYL) -N-METHYLFORMAMIDINE[J]. Environmental Chemistry, 1998, 17(1): 50-54.
Citation: Zhang Xiaohui, Mo Hanhong, Yang Kewu, An Fengchun. THE MEASUREMENT AND ESTIMATION OF THE VAPOR PRESSURE OF PESTICIDE N'-(2,4-DIMETHYLPHENYL) -N-METHYLFORMAMIDINE[J]. Environmental Chemistry, 1998, 17(1): 50-54.
shu

单甲脒饱和蒸气压的测定和估算

  • 1.

    中国科学院生态环境研究中心 北京 100085

  • 基金项目:

    国家自然科学基金资助项目

THE MEASUREMENT AND ESTIMATION OF THE VAPOR PRESSURE OF PESTICIDE N'-(2,4-DIMETHYLPHENYL) -N-METHYLFORMAMIDINE

  • 1.

    Research Center of Eco-Environmental Sciences, Chinese Aacdemy of Sciences, Beijing, 100085

  • Fund Project:

  • 摘要: 用气体饱和法测得单甲脒在15,25,35和45℃时的饱和蒸气压分别为0.202,0.556,1.95,6.29Pa;亨利常数计算值分别为6.30×10-4,1.67×10-3,5.68×10-3和1.78×10-2;根据Clausius Clapeyron方程求出单甲脒在常温下的气化热为89.2kJ·mol-1.从分子结构角度对25℃时单甲脒的饱和蒸气压及其升华热进行估算,估算值和实验测定值相对误差分别为9.1%和-22.0%.
    Abstract: At 15, 25, 35 and 45℃, the vapor pressures values of pesticide N'- (2, 4-dimethylphenyl)-N-methylfomamidine [DMA] measured by gas saturation method were 0. 202, 0. 556, 1. 95 and 6. 29Pa, respectively, and the Henry's law constants were calculated as 6. 30×10-4,1. 67×10-3,5. 68×10-3 and 1. 78×10-2,individually.The vaporization heat of DMA, 89.2kJ ·mol-1 at room temperature was calculated by Clausius-Clapeyron equation. The vapor pressure and the vaporization heat of DMA at 25℃ were estimated according to the molecule structure, the deviations of results of calculation and measurement were 9.1% and-22.0%, respectively.
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  • 收稿日期:  1996-10-08
莫汉宏, 杨克武, 安凤春, 张晓辉. 单甲脒饱和蒸气压的测定和估算[J]. 环境化学, 1998, 17(1): 50-54.
引用本文: 莫汉宏, 杨克武, 安凤春, 张晓辉. 单甲脒饱和蒸气压的测定和估算[J]. 环境化学, 1998, 17(1): 50-54.
shu
Zhang Xiaohui, Mo Hanhong, Yang Kewu, An Fengchun. THE MEASUREMENT AND ESTIMATION OF THE VAPOR PRESSURE OF PESTICIDE N'-(2,4-DIMETHYLPHENYL) -N-METHYLFORMAMIDINE[J]. Environmental Chemistry, 1998, 17(1): 50-54.
Citation: Zhang Xiaohui, Mo Hanhong, Yang Kewu, An Fengchun. THE MEASUREMENT AND ESTIMATION OF THE VAPOR PRESSURE OF PESTICIDE N'-(2,4-DIMETHYLPHENYL) -N-METHYLFORMAMIDINE[J]. Environmental Chemistry, 1998, 17(1): 50-54.
shu

单甲脒饱和蒸气压的测定和估算

  • 1. 中国科学院生态环境研究中心 北京 100085
  • 收稿日期:  1996-10-08
基金项目:

国家自然科学基金资助项目

摘要: 用气体饱和法测得单甲脒在15,25,35和45℃时的饱和蒸气压分别为0.202,0.556,1.95,6.29Pa;亨利常数计算值分别为6.30×10-4,1.67×10-3,5.68×10-3和1.78×10-2;根据Clausius Clapeyron方程求出单甲脒在常温下的气化热为89.2kJ·mol-1.从分子结构角度对25℃时单甲脒的饱和蒸气压及其升华热进行估算,估算值和实验测定值相对误差分别为9.1%和-22.0%.

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