Premium
Heat Capacity and Thermodynamic Properties of Myclobutanil
Author(s) -
Sun XiaoHong,
Liu YuanFa,
Tan ZhiCheng,
Jia YingQi,
Wang MeiHan,
Di YouYing
Publication year - 2005
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.200590006
Subject(s) - chemistry , heat capacity , adiabatic process , enthalpy , thermodynamics , calorimeter (particle physics) , standard molar entropy , melting temperature , atmospheric temperature range , entropy (arrow of time) , physics , materials science , detector , electrical engineering , composite material , engineering
The low‐temperature heat capacities of myclobutanil (C 15 H 17 ClN 4 ) were precisely measured with an automated adiabatic calorimeter over the temperature range from 78 to 368 K. The sample was observed to melt at (348.800 ±0.06) K. The molar enthalpy and entropy of the melting as well as the chemical purity of the substance were determined to be Δ fus H m (30931±11) J · mol −1 , Δ fus S m (88.47±0.02) J · mol −1 · K −1 and 99.41%, respectively. Further research of the melting process for this compound was carried out by means of DSC technique. The result was in agreement with that obtained from the measurements of heat capacities.