Abstract
A method of modifying empirical equations of state in order to improve their performance in the critical region is introduced. The implementation of this method involves the construction of a state function which measures the effective distance between the state in question and the critical state. A mathematical transformation, parameterized by this function, is then used to define a new equation of state which is designed to be identical in behavior to the original formulation outside the critical region, but to develop the nonclassical scaling behavior characteristic of real fluids near the critical point. Application of this method to an equation of state of van der Waals type is presented as an illustration.
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