室温离子液体EMIES的标准生成焓  

The Standard Molar Enthalpy of Formation of Room Temperature Ionic Liquid EMIES

作　　者：张志恒[1] 关伟[1] 杨家振[1] 谭志诚[2] 孙立贤[2] 

机构地区：[1]辽宁大学化学院,沈阳110036 [2]中国科学院大连化学物理研究所,大连116023

出　　处：《物理化学学报》2004年第12期1469-1471,共3页Acta Physico-Chimica Sinica

摘　　要：在(298.15±0.01)K下用转动弹热量计测定了离子液体硫酸乙酯-1-甲基-3-乙基咪唑(EMIES)及合成它的原料1-甲基咪唑的恒容燃烧热,通过计算得到它们的标准燃烧焓ΔcHm分别为(-2671±2)和(-286.3±0.5)kJ·mol-1;标准生成焓ΔfHm分别为(-3060±3)kJ·mol-1和(-2145±4)kJ·mol-1.结合文献上硫酸二乙酯的标准生成焓数据,得到了合成离子液体EMIES的反应热(-102.3±1.0)kJ·mol-1,与合成实验中观察到的强烈放热现象是一致的.根据离子液体EMIES的热容数据,计算了不同温度下EMIES的标准生成焓.Using RBC-II type oxygen-bomb combustion calorimeter, the molar combustion enthalpies of room temperature ionic liquid, 1-ethyl-3-methylimidazolium ethyl sulfate (EMIES), and 1-methylimidazole were determined at T = (298.15 +/- 0.01) K. For EMIES Delta(c)H(m)(circle minus) =(-2671 +/- 2) kJ (.) mol(-1) and for 1-methylimidazole (-286.3 +/- 0.5) kJ (.) mol(-1), respectively. The standard formation enthalpies Delta(f)H(m)(circle minus) were calculated to be (-3060 +/- 3) kJ (.) mol(-1) for EMIES and (-2145 +/- 4) kJ (.) mol(-1) for 1-methylimidazole. The reaction: [GRAPHICS] (1) is strong exothermic and its reaction heat, Delta(f)H(m)(circle minus), was determined to be (-102.3 +/- 1.0) kJ (.) mol(-1). The standard formation enthalpy of EMIES, Delta(f)H(T), at different temperatures was calculated on the basis of the heat capacity data of EMIES.

关 键 词：离子液体 氧弹量热计 标准燃烧焓 标准生成焓 

分 类 号：O642[理学—物理化学]