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中文摘要：
在273．15-353．15K范围内测定了[BMIM]CIO4离子液体的密度和表面张力。根据Glasser理论讨论了该离子液体的热力学性质，估算出其晶格能和标准熵。根据离子液体的空隙模型计算了离子液体的恒压热膨胀系数α=6．27×10-4K-1，与实验值α=5．46×10＂K-1基本一致。
英文摘要：
The density and surface tension for pure ionic liquid [BMIM]CIO4 （1-butyl-3-methylimidazolium perchlorate） were measured in the temperature range of 293. 15K to 353.15K. In terms of Glasserts theory, the thermodynamic properties of the ionic liquid were discussed with the standard molar entropy and lattice energy for [BMIM]CIO4 estimated. The thermal expansion coefficient,α=6.27×10-4K-1, calculated by the interstice model is in good agreement with a （experimental） = 5.46×10＂K-1.
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