Premium
An empirical equation of state for gases and vapours
Author(s) -
Sandri Robert
Publication year - 1987
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450650325
Subject(s) - vapours , thermodynamics , equation of state , bar (unit) , chemistry , constant (computer programming) , entropy (arrow of time) , atmospheric temperature range , physics , meteorology , neuroscience , computer science , biology , programming language
A simple pressure‐explicit equation of state for gases and vapours is presented which contains eight empirical constants in addition to the gas constant. It has been applied to four substances and reproduces their behaviour very well over a wide range of temperature (several hundred degrees), density (up to critical) and pressure (maximum 600 to 900 bar). For application above critical temperature only, a shorter version of the equation is presented for four more substances. Simple expressions are derived for entropy and internal energy.