Thermophysical Properties of Water and

S. L. Rivkin and A. A. Aleksandrov, The Thermophysical Properties of Water and Water Vapor, Energia, Moscow, 1977 (in Russian). 

While standardizing the values for the thermophysical properties of water and steam, also known as water substance, the International Association for the Properties of Steam (lAPS) has established formulations for various properties. 

Vukalovich, M. P., Rivkin, S. L., Aleksandrov, A. A., (1969) Tables of Thermophysical Properties of Water and Steam. Izdatelstvo standartov... 

TABLE 2.16 Thermophysical Properties of Water and Steam at Various Temperatures and Pressures... 

These table snmmarize the thermophysical properties of water and steam at tem-peratnres up to 100°C (373.15 K) and pressure of 1 bar in liquid state. The tabulated properties are pressure (P), density (p), enthalpy (//), entropy (5), isochoric heat capacity (C,), isobaric heat capacity (Cp), speed of sound (m), viscosity (q), thermal conductivity (K), and static dielectric constant (D). 

Like many other aspects of science, data compilation efforts can be carried out more efficiently if there is cooperation at an international level. This is particularly important when physical and chemical data affect technological issues, such as performance specifications on articles in international trade or rules for custody transfer of commodities. An early example of the need for international agreement on physical data is provided by the International Association for the Properties of Steam (lAPS). This group was established more than 60 years ago with the aim of reaching international agreement on the thermophysical properties of water and steam, which are crucial in specifying the performance of turbines, boilers, and pumps. Its international steam tables have been adopted as standards for trade and coiiunerce, as well as for scientific applications. The data evaluation efforts of the International Union of Pure and Applied Chemistry (lUPAC) are discussed later. 

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