用精密自动绝热量热计测定了分析纯级硬脂酸在 80— 360 K温区的热容 ,获得固液熔化相变的热力学参数 :熔点为 340 .1 86K,熔化焓为 50 .93k J.mol-1 ,熔化熵为 1 4 9.71 J.mol-1 K-1 ,同时还对导热性能及热稳定性能等进行了实验测定。 The heat capacity of pure grade stearic acid in the temperature range from 80 to 360 K was measured by a precision automatic adiabatic calorimeter to obtain the thermodynamic parameters of the solid-liquid phase transition. The melting point was 340.186K and the enthalpy of fusion was 50.93 kJ mol-1, and the entropy of melting was 14.71 J.mol-1 K-1. The thermal conductivity and thermal stability were also tested experimentally.