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Citation: Zhang Zhi-Heng, Guan Wei, Yang Jia-Zhen, Tan Zhi-Cheng, Sun Li-Xian. The Standard Molar Enthalpy of Formation of Room Temperature Ionic Liquid EMIES[J]. Acta Physico-Chimica Sinica, ;2004, 20(12): 1469-1471. doi: 10.3866/PKU.WHXB20041214 shu

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

1.
Department of Chemistry, Liaoning University, Shenyang　110036; 1Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian　116023

Received Date: 2 April 2004
Available Online: 15 December 2004

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 =(－2671±2) kJ·mol－1 and for 1-methylimidazole (－286.3±0.5) kJ·mol－1, respectively. The standard formation enthalpies were calculated to be (－3060±3) kJ·mol－1 for EMIES and (－2145±4) kJ·mol－1 for 1-methylimidazole. The reaction: ＋ (C2H5)2SO4 → [ ＋ C2H5OSO3－ ](l) is strong exothermic and its reaction heat, , was determined to be (－102.3±1.0) kJ·mol－1. The standard formation enthalpy of EMIES, ΔfHT, at different temperatures was calculated on the basis of the heat capacity data of EMIES.
- Ionic liquid;　Oxygen-bomb combustion calorimeter;　EMIES;　Standard molar enthalpy of combustion;　Standard molar enthalpy of formation
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