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利用精密自动绝热热量计直接测定了配合物Zn(Met)SO4·H2O(s)在78～370K温区的摩尔热容.通过热容曲线的解析得到该配合物的起始脱水温度为T0=329.50K.将该温区的摩尔热容实验值用最小二乘法拟合得到摩尔热容(Cp,m)对温度(T)的多项式方程,并且在此基础上计算出了它的舒平热容值和各种热力学函数值.依据Hess定律,通过设计热化学循环,选择体积为100cm3、浓度为2mol·L-1的盐酸作为量热溶剂,利用等温环境溶解-反应热量计,测定和推算出该配合物的标准摩尔生成焓为?fHms=-(2069.30±0.74)kJ·mol-1.
The molar calorific value of complex Zn (Met) SO4 · H2O (s) in the temperature range from 78K to 370K was determined directly by a precision automatic adiabatic calorimeter.The initial dehydration temperature of the complex was found to be T0 = 329.50 K. The experimental value of molar heat capacity in this temperature region was fitted by the least squares method to obtain the polynomial equation of molar heat capacity (Cp, m) versus temperature (T), and on the basis of which the heatsoft Capacitance and various thermodynamic functions.According to Hess’s law, hydrochloric acid with a volume of 100cm3 and a concentration of 2mol·L-1 was selected as a quantity-heat solvent by means of a thermochemical cycle, and the isothermal environment dissolved-reaction calorimeter was used to measure and calculate The standard molar enthalpy of formation for this complex is? FHms = - (2069.30 ± 0.74) kJ · mol-1.