Vol. 12, no.1, 2020


Cluster structure of water and its argon-like equation of state

Nikolay P. Malomuzh

Odessa I.I. Mechnikov National University, http://onu.edu.ua/
Odessa 65026, Ukraine
E-mail: mnp@onu.edu.ua

Received January 22, 2020; peer reviewed February 05, 2020; accepted February 10, 2020
Abstract. The paper is devoted to the discussion of the physical nature for water properties having similarity with ones for argon-like liquids and ones for their amorphous states. The strong clusterization of molecules in liquid water is a natural basis for so wide diapason of its physical properties. It is taken into account that the cluster composition and their properties strongly depend on temperature and pressure. The averaged life time τ0 of clusters is one of the chief characteristics of clusters. If behavior of some water characteristics is determined by molecular configurations with their life times τc >> τ0, one can speak that they are determined by the averaged interparticle potentials between water molecules. The position of vapor-liquid binodal can serve as a typical example of such properties. At the same time, the entropy and heat capacity of water are mainly determined by thermal excitations of clusters for which: τexc << τ0. From here it follows that at beginning we should clear understand what slow or quick molecular processes are dominating in the formation of considered characteristics of water.

Keywords: water, clusters, cluster excitations, equation of state, coexistence curve, heat capacity, dielectric permittivity

UDC 538.91

RENSIT, 2020, 12(1):39-48. DOI: 10.17725/rensit.2020.12.039.

Full-text electronic version of this article - web site http://en.rensit.ru/vypuski/article/312/12(1)39-48e.pdf