The standard molar enthalpy of formation of liquid hydrogen fluoride ΔfHom(HF, l) at the temperature 298.15 K determined by direct combination of the elements in a fluorine-bomb calorimeter

Article abstract of DOI:10.1006/jcht.1994.1053

The standard molar enthalpy of formation of liquid hydrogen fluoride Δ_fH^o_m(HF, l) = -(303.56 +/- 0.27) kJ*mol^-1 at T=298.15 K and p^o=101.325 kPa has been measured by direct reaction of gaseous hydrogen and fluorine in a bomb calorimeter.This result, combined with the standard molar enthalpy of solution Δ_solH^o_m(HF, l) reported by Johnson et al. (J.Chem.Thermodynamics 1973, 5, 793) gives the standard molar enthalpy of formation of F^- (aq) at infinite dilution: Δ_fH^o_m(F^-, aq, 298.15 K) = -(335.66+/-0.31) kJ*mol^-1.