中文摘要：

用精密氧弹热量计测定了4种离子液体：氯化1-甲基-3-乙基咪唑（C2MIC），氯化1-甲基-3-丁基咪唑（c4MIC），氯化1-甲基-3-戊基咪唑（C5MIC）和氯化1-甲基-3-己基咪唑（C6MIC）的燃烧热，计算了它们的标准摩尔燃烧焓△cHm^ 和标准摩尔生成焓△fHm^ ，结合文献中的标准摩尔溶解焓，估算了烷基咪唑阳离子在水溶液中的标准摩尔生成焓，以及亚甲基对标准摩尔燃烧焓和标准摩尔生成焓的贡献．

英文摘要：

Using an oxygen-bomb combustion calorimeter the molar combustion heats of the ionic liquids of alkylimidazolium chloride： 1-methyl-3-ethylimidazolium chloride （C2MIC）, 1-methyl-3-butylimidazo- lium chloride （C4MIC）, 1-methyl-3-pentylimidazolium chloride （CsM1C）, and 1-methyl-3-hexylimidazolium chloride （C6MIC）, were determined at （298.15 ±0.01） K. The standard molar combustion enthalpies AcHme and the standard molar formation enthalpies △fHm^ were calculated. With standard molar enthalpies of solution △sHm^ of C2MIC, C4MIC, C5MIC and C6MIC in literature, the standard molar enthalpies of formation of C2MI^＋, C4MI^＋, C5MI^＋, and C6MI^＋ were obtained. The contribution of one methylene group to the △cHm^ and △fHm^ was also estimated, respectively.