Molar excess enthalpies of binary liquid mixtures of γ-butyrolactone + benzene, + toluene, + ethylbenzene, and + carbon tetrachloride were measured by means of a flow microcalorimeter of Picker type at 293.15 K. For the γ-butyrolactone + carbon tetrachloride mixture the molar excess volume was determined from density measurements at 293.15 K and 313.15 K. All measurements were performed at atmospheric pressure.

Molar excess enthalpies of binary liquid mixtures of γ-valerolactone or δ-valerolactone + benzene, + toluene, or + ethylbenzene were measured by means of a flow microcalorimeter of Picker type at 293.15 K and atmospheric pressure.