Heat Capacity and Thermodynamic Properties of Crystalline Pyrimethanil  Phenoxyacetate(C20H21N3O3)

Chem. J. Chinese Universities

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Heat Capacity and Thermodynamic Properties of Crystalline Pyrimethanil Phenoxyacetate(C₂₀H₂₁N₃O₃)

SUN Xiao-Hong^1*; LIU Yuan-Fa²; TAN Zhi-Cheng³; JIA Ying-Qi²; WANG Mei-Han³

1. Chemical Research Institute, Northwest University,
2. Department of Chemistry, Northwest University, Xi'an 710069, China; 3. Thermochemistry Laboratory, Dalian Institute of Chemical Physics,
Chinese Academy of Sciences, Dalian 116023, China

Received:2005-05-23 Revised:1900-01-01 Online:2006-06-10 Published:2006-06-10
Contact: SUN Xiao-Hong

Abstract

Abstract: Low-temperature heat capacities of Pyrimethanil phenoxyacetate(C₂₀H₂₁N₃O₃) were precisely measured with a high-precision automated adiabatic calorimeter over the temperature range between 81 to 380 K. The compound was observed to melt at(349.38±0.04) K. The molar enthalpy Δ_fusH_m, and entropy of fusion, Δ_fusS_m of the compound were determined to be (34.279±10) J/mol, (98.13±0.05) J/(mol•K), respectively. The thermodynamic function data relative to the reference temperature(298.15 K) were calculated based on the heat capacities measurements in the temperature range from 80 K to 325 K.

Key words: Pyrimethanil phenoxyacetate, Heat capacity, Thermodynamic function, Adiabatic calorimetry

CLC Number:

O642.3

TrendMD:

SUN Xiao-Hong^1*; LIU Yuan-Fa²; TAN Zhi-Cheng³; JIA Ying-Qi²; WANG Mei-Han³. Heat Capacity and Thermodynamic Properties of Crystalline Pyrimethanil Phenoxyacetate(C₂₀H₂₁N₃O₃)[J]. Chem. J. Chinese Universities, doi: .

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Heat Capacity and Thermodynamic Properties of Crystalline Pyrimethanil Phenoxyacetate(C₂₀H₂₁N₃O₃)

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