Heat Capacity and Enthalpy of Fusion of Crystalline Pyrimethanil Decylate （ C22 Haa Na O2 ）

Heat Capacity and Enthalpy of Fusion of Crystalline Pyrimethanil Decylate （ C22 Haa Na O2 ）

Low-temperature heat capacities of pyrimethanil decylate （ C22 H33 N3 O2 ） were precisely measured with an automated adiabatic calorimeter over the temperature range from 78 to 373 K. The sample was observed to melt at （311.04 ± 0.06） K. The molar enthalpy and entropy of fusion as well as the chemic...

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Veröffentlicht in:Chemical research in Chinese universities 2005, Vol.21 (6), p.697-701
1. Verfasser: SUN Xiao-hong LIU Yuan-fa TAN Zhi-cheng WANG Mei-han JIA Ying-qi
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杂环化合物
热容量
热量测定
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description Low-temperature heat capacities of pyrimethanil decylate （ C22 H33 N3 O2 ） were precisely measured with an automated adiabatic calorimeter over the temperature range from 78 to 373 K. The sample was observed to melt at （311.04 ± 0.06） K. The molar enthalpy and entropy of fusion as well as the chemical purity of the compound were determined to be（45876± 12） J/mol, （147. 50 ±0. 05） J. mol^-1 · K^-1 and （99. 21 ±0. 03）% （mass fraction）, respectively. The extrapolated melting temperature for the absolutely pure compound obtained from fractional melting experiments is （311. 204±0. 035 ） K.
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热容量
热量测定
title Heat Capacity and Enthalpy of Fusion of Crystalline Pyrimethanil Decylate （ C22 Haa Na O2 ）
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