Abstract
In the framework of scaling theory and the principle of isomorphism of critical phenomena in mixtures, the analytical expression for the light-scattering intensity in a binary fluid mixture has been obtained in rather wide vicinity of its liquid–gas critical point. The deduced validity condition for the light-scattering intensity as an explicit function of temperature or density reveals the adequacy of the description of the obtained experimental data for the methane–pentane binary mixture. The good agreement between the theory and the experiment has been demonstrated. The critical temperature and density values were obtained as a result of optimization procedure.
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