Excess enthalpies for (water + benzene) in the liquid and supercritical regions atT= 503 K toT= 592 K andp= 16.4 MPa
✍ Scribed by C.J. Wormald; J. Slater
- Publisher
- Elsevier Science
- Year
- 1996
- Tongue
- English
- Weight
- 389 KB
- Volume
- 28
- Category
- Article
- ISSN
- 0021-9614
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✦ Synopsis
Flow calorimetric measurements of the excess molar enthalpy H E m of {xH2O+(1-x)C6H6} measured at the pressure 16.4 MPa are reported. Measurements made at the temperatures (503, 521, 544, and 560) K are in a region of the phase diagram which shows partial miscibility of the two liquids. Measurements made at the temperatures 576 K and 581 K are in a homogeneous fluid region, and measurements made at T=592 K cross a liquid-vapour two phase loop at xq0.75. The H E m (x) diagrams all show linear behaviour where two phase regions are crossed, and the extrema of these linear sections gives information about the location of phase boundaries. Values of H E m at x=0.5 are shown to lie on curves which are a continuation into the liquid phase region of vapour phase H E m (x=0.5) measurements published previously. The measurements are compared with the cubic equation of state of Patel and Teja. The equation generates H E m (x) isotherms which have the correct shape and which are closer to the experimental measurements at high temperatures than at low temperatures.