Heats of mixing for ternary systems: n‐Alkanes + Two n‐Alcohols

Abstract

Heats of mixing for 21 ternary systems of one n‐alkane + two n‐alcohols are reported at 25°C. Evaluation of four equations permitting the prediction of heats of mixing of ternary systems from binary data is made. Scatchard's modified equation for systems containing a polar component was found to be the most accurate.

Heats of mixing for the ternary system ethanol-1-propanol-cyclohexane at 25.degree.C

“…IV K= V(xa/Ka +xb/Kb) (7) where xa = xa/(xa + xb) and xb = xb/(xa + xb). Ternary heats of mixing of Ramalho and Ruel (6) for 17 systems were correlated by using the parameters obtained from their constituent binary data. Available data to be predicted for ethanol-1-propanol-cyclohexane were limited to 30 points which were selected at random over the composition range.…”

Heats of mixing for ternary systems: n‐Alkanes + Two n‐Alcohols

“…The calculated heats of mixing, for the ternary system, needed to complete the ternary diagr m s , were corrected by using a plot of these deviations. Sampl4:s of such plots arc presented in Figures 7 , 8…”

Excess molar enthalpies for the methanol-1-butanol-benzene system at 25.degree.C

“…Values of h^2 at three concentrations were interpolated by using a spline-fit method. Equation 1 does not involve any approximation (8). Table I lists the ternary excess molar enthalpies A^23 of the methanol (1)-1-butanol (2)-benzene (3) system at 25 °C.…”