Calorimetric Study and Thermal Analysis of 4-(Aminomethyl) Benzoic Acid

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+91.771X+6.4372X(2)+1.7517X(3)-4.991X(4)+8.909X(5)+1.585X(6), X = (T235)/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: Delta(c)H(m)(circle minus) = -(4300 +/- 4) kJ.mol(-1) and Delta(f)H(m)(circle minus) = -(420 +/- 5) kJ.mol(-1).