Modified Associate Formalism without Entropy Paradox: Part I. Model Description

TL;DR

This paper introduces a modified associate formalism for thermodynamic modeling of solution phases that avoids the entropy paradox, applicable to multiple components and associate sizes, with analysis of dilute solution behavior.

Contribution

It presents a new thermodynamic model free from the entropy paradox, extending to multiple components and associate sizes, with analysis of dilute solution activities.

Findings

Model is free from the entropy paradox.

Applicable to arbitrary number of components and associate sizes.

Analyzes asymptotic behavior in dilute solutions.

Abstract

A Modified Associate Formalism is proposed for thermodynamic modelling of solution phases. The approach is free from the entropy paradox described by L\"{u}ck et al. (Z. Metallkd. 80 (1989) pp. 270--275). The model is considered in its general form for an arbitrary number of solution components and an arbitrary size of associates. Asymptotic behaviour of chemical activities of solution components in binary dilute solutions is also investigated.