The standard molar enthalpy of formation of room temperature ionic liquid EMIES

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: