Study, on thermochemistry of room temperature ionic liquid 1. Solution enthalpy of EMIES and Pitzer's parameters

Using the solution reaction isoperibol calorimeter, the molar solution enthalpies of room temperature ionic liquid, 1-ethyl-3-methylimidazolium ethyl sulfate (EMIES), with various molalities were determined at T = 303.150 K in water. According to Pitzer' s electrolyte solution theory, the molar solution enthalpy of EMIES at infinite dilution, Delta(s)H(m)(0), and Pitzer's parameters: beta(MX)((0)L), beta(MX)((1)L) and C-MX(phiL) were obtained. Then the values of apparent relative molar enthalpy L-phi, and relative partial molar enthalpy of solvent and solute (EMIES), (L) over bar (1) and (L) over bar (2) were calculated, respectively.