| Abstract |
The vapour pressure differences between a mixture of (propane + cyclopropane) and cyclopropane and between propane and cyclopropane have been measured simultaneously with the absolute vapour pressure of cyclopropane. This was done at 13 temperatures between 175 K and 210 K, as a function of composition. The mixtures show small positive deviations from Raoult s law. The excess molar Gibbs energy (G(m)(E)) has been calculated from the vapour pressure data and fitted to the equation G(m)(E)/(RTx(1)x(2) = (-0.2490 +/- 0.0072) + (81.8 +/- 1.4)/T. The estimated value of the excess molar enthalpy (H-m(E)) for the equimolar composition, in the same temperature range is 170 +/- 4 J mol(-1). The results were interpreted using Deiters equation of state. (C) 1997 Elsevier Science B.V. |
