Francesconi. Lunelli, and Comelli studied the liquid-vapor equilibria of trichloromethane and l,2-epoxybutane at several temperatures (R. Francesconi, B. Lunelli, and F. Comelli, j. Chern. Eng. Data 41, 310 (1996)). Among their data are the following measurements of the mole fractions of trichloromethane in the liquid phase (xT) and the vapour phase (YT) at 298.15 K as a function of pressure. P(kPa) 23.40 21 .75 20.25 18.75 18.15 20.25 22.50 26.30x 0 0.129 0.228 0.353 0.511 0.700 0.810 1.000y 0 0.065 0.145 0.285 0.535 0.805 0.915 1.000Compute the activity coefficients of both components on the basis of Raoult's law.