Abstract
An acetic acid ionic liquid (AcAIL) [C2mim][OAc] (1-ethyl-3-methylimidazolium acetate) was prepared by the neutralization method. Using the solution-reaction isoperibol calorimeter, molar enthalpies of solution, ΔsolHm, for the ionic liquid [C2mim][OAc] with different molalities were measured in the temperature range from (288.15 to 308.15 ± 0.01) K with an interval of 5 K. In terms of Archer’s method, the standard molar enthalpies of solution, ΔsolHmθ, for [C2mim][OAc] were obtained in the temperature range of (288.15 to 308.15 ± 0.01) K. Plotting ΔsolHmθ against (T – 298.15) K, a good straight line was obtained, with the slope of the line being the standard molar heat capacity of solution, ΔCp,mθ = 411 J·K–1·mol–1, for [C2mim][OAc], and the specific heat capacity of solution, ΔCpθ = 2.4 J·g–1·K–1, was also obtained.
Published Version
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