1. Heat capacity and enthalpy of fusion of pyrimethanil laurate (C24H37N3O2)
- Author
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Sun, Xiao-Hong, Liu, Yuan-Fa, Tan, Zhi-Cheng, Di, You-Ying, Wang, Hui-Fang, and Wang, Mei-Han
- Subjects
- *
THERMODYNAMICS , *ENTHALPY , *THERMAL analysis , *ANALYTICAL chemistry - Abstract
Low-temperature heat capacities of pyrimethanil laurate (C24H37N3O2) were precisely measured with an automated adiabatic calorimeter over the temperature range between T=78 K and T=340 K. The sample was observed to melt at (321.52±0.04) K. The molar enthalpy and entropy of fusion as well as the chemical purity of the compound were determined to be (67244±11) J·mol−1, (209.28±0.02) J·mol−1·K−1, (0.9943±0.0004) mass fraction, respectively. The extrapolated melting temperature for the absolutely pure compound obtained from fractional melting experiments was (322.264±0.006) K. [Copyright &y& Elsevier]
- Published
- 2004
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