It has been suggested that since the one-parameter Margules expansion is not flexible enough to fit most

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It has been suggested that since the one-parameter Margules expansion is not flexible enough to fit most activity coefficient data, it should be expanded by adding additional constants. In particular, the following have been suggested:

Two-parameter models: In In 7 = Ax In 7 Ax = Three-parameter model: In = Ax2 In 72 = Bx In 72 = = Ax In 2 =

In each case the reference states are the pure components at the temperature and pressure of the mixture.

a. Which of these models are reasonable?

b. What are the allowable values for the parameters A, B, and n in each of the models?

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Chemical Biochemical And Engineering Thermodynamics

ISBN: 9780470504796

5th Edition

Authors: Stanley I. Sandler

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Question Posted: Nov 17, 2023 06:30 AM

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It has been suggested that since the one-parameter Margules expansion is not flexible enough to fit most

Question:

Two-parameter models: In ₁ In ₁ = Ax² In yı ₁ = Ax2 Three-parameter model: In ₁ = Ax2 In 72 = Bx² In 72 = = Ax In 2 = Bx¹

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The expressions you provided seem to represent different parameterizations of the Margules expansion ...View the full answer

Chemical Biochemical And Engineering Thermodynamics

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