PVT data were obtained for the carbon dioxide-ethylene system at 40°, 50°, 75°, 100°, and 125°C ., at pressures from 5 to 500 atm. Mixtures of approximately 20, 40, 60, and 80 mole % ethylene and the two pure components were investigated by use of the Burnett method. Compressibility factors obtained from experimental data are tabulated and smoothed results are reported as polynomials in density. The experimental data were used to obtain the second virial coefficients for the pure gases and the mixtures, and the constants for the Benedict-Webb-Rubin equation of state were evaluated for the pure components and the four mixtures in the temperature range of 50°to 125°C. The rules for combining constants to predict JOURNAL OF CHEMICAL AND ENGINEERING DATA B. 10,000 p.s.i. Blackhawk hand pump C. Oil leg of liquid-piston pump D. Gas leg of liquid-piston pump E. High-range dead weight piston gage F. Low-range dead weight piston gage G. Mercury traps H. Open-tube manometer J. Commercial gas cylinders K. Vacuum pumps L. Vacuum gage M. Cold trap N. Diaphragm pressure indicator P. Pressure gages V. Pressure vessels
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