中文摘要：

采用绝热量热法测量了由离子液体1-乙基-3-甲基咪唑磷酸二甲酯[EMIM][DMP]分别与CH_3OH/C_2H_5OH和H_2O所组成的两组三元工质溶液体系[EMIM][DMP]（1）＋CH_3OH（2）/C_2H_5OH（2）＋H_2O（3）在298.15 K,常压下的摩尔混合焓H_m~E。采用Redlich-Kister（RK）方程以及Nagata和Tamura（NT）提出的多项式方程对实验数据进行关联。结果表明,两组三元体系的混合焓在实验浓度范围内均为负值,混合为放热过程,具有成为吸收制冷循环新工质溶液的基本特征。混合焓的关联值与实验值的平均相对误差分别为0.90%和0.88%。

英文摘要：

The excess molar enthalpies of ternary working solutions containing ionic liquid,l-Ethyl-3- methylimidazolium dimethylphosphate[EMIM][DMP],[EMIM][DMP]＋Methanol/Ethanol ＋ Water, were measured with an adiabatic calorimeter at 298.15 K and under the normal atmospheric pressure. The experimental excess molar enthalpies of ternary working solutions were correlated with the polynomial proposed by Nagata and Tamura（NT）,while the binary parameters were correlated by using the Redlish-Kister＇s polynomial（RK）.The results show that the excess enthalpies of the two set of ternary solutions were negative in the whole range of concentration,which indicated that the mixed process was exothermic.Meanwhile,the average relative deviations（ARD） between the correlated data and the experimental ones for these ternary solutions were 0.9%and 0.88%.respectively.