IAPWS G9-12
Guideline on a Low-Temperature Extension of the IAPWS-95 Formulation for Water Vapor
October 2012
PDF of document
Description
This Guideline provides a low-temperature extension of the ideal-gas equation used in the
IAPWS Formulation 1995 for the Thermodynamic Formulation of Ordinary Water Substance
for General and Scientific Use. This allows IAPWS-95 to be used for vapors at temperatures as low
as 50 K (compared to the original limit of 130 K).
Software Implementation
The IAPWS Subcommittee on Seawater, in cooperation with the
SCOR/IAPSO Working Group 127,
developed the "Thermodynamic Equation of Seawater 2010" (TEOS-10) which was endorsed as an international standard for oceanography by
UNESCO-IOC in 2009 and by
IUGG in 2011.
The open-source code of TEOS-10
includes software implementations of this IAPWS formulation.
Note that IAPWS is not responsible for the content of these external pages.
Revision History
- This Guideline was adopted by IAPWS in 2012.
This Guideline is the product of the Working Group "Thermophysical Properties of Water and Steam" (TPWS) and the Subcommittee on Seawater (SCSW) of the International Association for the Properties of Water and Steam (IAPWS).
This page updated September 21, 2016
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