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Calorimetric Study and Thermal Analysis of 4‐(Aminomethyl) Benzoic Acid
Author(s) -
ZHENG Qingyun,
TAN Zhicheng,
WANG Difan,
HAO Aiping,
LIU Beiping,
LÜ Xuechuan,
SHI Quan
Publication year - 2009
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.200990110
Subject(s) - chemistry , calorimeter (particle physics) , calorimetry , benzoic acid , enthalpy , adiabatic process , combustion , heat capacity , heat of combustion , analytical chemistry (journal) , thermodynamics , atmospheric temperature range , standard enthalpy of formation , standard enthalpy of reaction , organic chemistry , physics , detector , electrical engineering , engineering
Molar heat capacities of 4‐(aminomethyl)benzoic acid were precisely measured with a small sample precision automated adiabatic calorimeter over the temperature range from 80 to 400 K, and the heat capacity data were fitted to a polynomial equation: C p ,m =162.01+91.771 X +6.4372 X 2 +1.7517 X 3 −4.991 X 4 +8.909 X 5 +1.585 X 6 , X = ( T −235)/155. The constant‐volume energy of combustion of the compound was measured by means of a precision oxygen bomb combustion calorimeter. The standard enthalpy values of combustion and formation were determined to be: Δ c H m ⊖ = − (4300±4) kJ·mol −1 and Δ f H m ⊖ = −(420±5) kJ·mol −1 .