Abstract
The theory of 'conformal solutions' is used to calculate the liquid-vapour phase diagram of the azeotropic system carbon dioxide-ethylene in the critical region. For the calculations it is sufficient to know the thermodynamic functions of the pure components and the value of one theoretical constant. The calculated results are given as isothermal pressure-mole fraction plots at temperatures from —30 to + 10° C. The theoretical curves agree well with those determined experimentally by Haselden, Newitt & Shah, establishing the usefulness of the theory in this interesting region.
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