Peculiar points in the phase diagram of the water-alcohol solutions

TL;DR

This paper investigates the unique behavior of dilute water-alcohol solutions, identifying a peculiar point near a specific concentration, and demonstrates that these solutions follow a principle of corresponding states when using temperature and volume fraction.

Contribution

It reveals the existence of a peculiar point in water-alcohol solutions and shows they obey a principle of corresponding states based on temperature and volume fraction.

Findings

Existence of a peculiar point near x_{ν}=0.28

Water-alcohol solutions follow the principle of corresponding states

Predictions about solution behavior at the peculiar point

Abstract

The work is devoted to the investigation of nontrivial behavior of dilute water-alcohol solutions. The temperature and concentration dependencies of the contraction for aqueous solutions of ethanol and methanol are analyzed. The existence of a specific point, the so-called peculiar point, was established. It is shown that water-alcohol solutions of different types obey the principle of corresponding states if temperature and volume fraction are used as principal coordinates. In this case, the concentration of the peculiar point for different solutions is close to x_{\nu}=0.28. Several predictions are made.