We have measured the ternary liquid-liquid equilibria of water + ethanol mixtures with, separately, 2,2,4-trimethylpentane and toluene at 5 and 40 degrees C, water + tert-amyl alcohol (TAOH) mixtures with, separately, toluene and hexane at 5 and 40 degrees C, and of water + TAOH + pentane mixtures at 5 degrees C. The ethanol-containing systems exhibit type 1 Liquid-Liquid phase behavior, and the TAOH-containing systems exhibit type 2 behavior. These data, together with the data we have previously reported at 25 degrees C, provide information on how the liquid-liquid equilibria of these systems change as a function of temperature. While the addition of ethanol is found to increase the solubility of hydrocarbons in the aqueous phase, the concentration of the hydrocarbon in the water-rich phase decreases with increasing temperature. With the exception of the hydrocarbon in the water-rich phase, our experimental data could be correlated quite well with either the UNIQUAC or NRTL models. For most of the systems considered here the predictions of the phase behavior with the liquid-liquid UNIFAC group-contribution model are only qualitatively correct. However, the liquid-liquid UNIFAC model erroneously predicts type 2 phase behavior to occur for the water + ethanol + 2,2,4-trimethylpentane system at 5 degrees C.