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通过精密自动绝热热量计测定了2-碘-3-硝基甲苯(C_7H_6INO_2)在79～373K温区的摩尔热容.实验结果表明,这个化合物在331～340K温度区间有一个固-液熔化相变,其熔化温度、摩尔熔化焓、摩尔熔化熵以及该样品的化学纯度分别为:(339.311±0.035)K,(20677.54±40.09)J·mol~(-1),(61.04±0.13)J·mol~(-1)·K~(-1)和99.73％.用热容多项式方程进行数值积分获得了该物质在298.15～370K温区每隔5K的热力学函数值.用DSC分析对它的固-液相变过程作了进一步的研究.
The molar heat capacities of 2-iodo-3-nitrotoluene (C_7H_6INO_2) in the temperature range of 79 ~ 373K were determined by a precision automatic adiabatic calorimeter.The experimental results show that this compound has a solid-liquid melted phase in the temperature range of 331 ~ 340K (339.311 ± 0.035) K, (20677.54 ± 40.09) J · mol -1, (61.04 ± 0.13) J · (-1), respectively. The melting temperature, molar melting enthalpy, molar melting entropy and the chemical purity of the sample were mol -1 K -1 and 99.73% .The thermodynamic function values of the material at 5K intervals at 298.15 ~ 370K were obtained by numerical integration of the heat capacity polynomial equation.Using DSC analysis, - liquid phase change process made further research.