An Interactive Computer Program for Binary Liquid-Vapor Equilibria An interactive computer program (written in PLI1 for the IBM 3701145 with time sharing option CALL-OS) is now available for computing the liquid and vapor composition curves as a function of temperature for any volatile two-component liquid system. The program is a significantly improved version of that described by Daniels, et al,' and is used with appropriate midance hv ~hvsical ehemistrv students as part of their lahoratorv in dealing with real . experience . .our . . solution phenomena in a modern laboratory environment. Both ideal and nonideal behavior with activity coefficients determined from the van Laar equations are included in a self-evident output format giving the mole fraction of hoth components in hoth phases a t each temperature. The only input data required are: the corrected barometric pressure, azeotropic composition and boiling point, and the Antoine Vapor Pressure Equation coefficients for hoth components. Copies of the program with sample output are available from GFP upon request.
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'Daniels, F., et al, "Experimental ~hysical'~hemistry," 7th Ed., McGraw-HillBook Co. New York, 1970, pp. 452-454. University of Wisoonsin-Osbkosh Oshkosh, 54901
Gilbert F. Pollnow Michael J. Vander Wielen
Volume 53, Number 2 Febnra'y 1976 / 97
