The enthalpies of mixing In systems tri-n-butyl phosphate-diluent (hex
ane-decane, carbon tetrachloride, benzene, toluene, and chloroform) we
re determined calorimetrically at 298.15 K. The entropies of mixing in
these systems were calculated on the basis of Gibbs excess energy dat
a. The influence of the nature of the diluent on thermodynamic functio
ns of mixing is discussed.