VOLUMETRIC AND THERMODYNAMIC PROPERTIES OF LIQUID-MIXTURES OF 2-N-BUTOXYETHANOL WITH WATER

p-V-T data for six compositions of 2-n-butoxyethanol (BE) and water ha ve been obtained in the form of volume ratios at several temperatures in the range 278.15 to 353.13 K at pressures from atmospheric to 347 M Pa or higher. One of the compositions is in the region where two phase s exist at certain temperatures, while two compositions are near the b oundary of that region. Densities at atmospheric pressure in a tempera ture range similar to that for the p-V-T data are also reported. Isoth ermal compressibilities, isobaric expansivities, and changes in the is obaric heat capacity have been calculated from the volumetric data for pressures up to 300 MPa. The values of normalized volume fluctuations obtained from the data at 0.1 MPa approach those of water for conditi ons which are close to those for phase separation in this system. Such behavior is not observed at 100 MPa, where such separation is suppres sed.