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Abstract

The Lielmezs-Howell-Campbell (LHC) equation of state, originally proposed for saturated states, was further developed to study P-V-T and thermodynamic properties of 14 select pure fluids. Using the dimensionless T* coordinates: [See Thesis for Equation] two new temperature dependent functions, a(T*)⁻ and a(T *)[sup c], were proposed. Test comparisons were made between the LHC, Soave 1972, Redlich-Kwong, Lee-Kesler, Benedict-Webb-Rubin, and Boublik-Alder-Chen-Kreglewski equations for 14 organic, inorganic and quantal fluids over P-V-T ranges where available data permitted. The LHC equation performed as consistently and accurately as the 5 already established equations in calculating P-V-T properties, Joule-Thomson coefficients, inversion curve coordinates, fugacities, the two heat capacity, Cp and Cv, values as well as the thermodynamic departure functions of: enthalpy, entropy, internal energy, Gibbs and Helmholtz free energies. All results were compared on the bases of root mean square percent, RMS-%, error and the central processing unit (CPU) time. Finally, thermodynamic departure plots were produced using the LHC equation.