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Title: Speed Of Sound And Related Thermodynamic Properties Calculated From The AGA Report No. 8 Detail Characterization Method Using A Helmholtz Energy Formulation
Author: Eric W. Lemmon, Kenneth E. Starling
Source: American Gas Association 2003
Year Published: 2003
Abstract: The AGA Report No. 8 Detail Characterization Method allows for the calculation of the compressibility factor (or pressure) for a natural gas mixture given known conditions of temperature, density, and composition. Iterative procedures can be used to calculate the density when the pressure and temperature are known. Other thermodynamic properties such as the speed of sound, heat capacities, enthalpies, or entropies can be calculated from the AGA8 model if the equation of state is rewritten in a form explicit in the Helmholtz energy. In addition, equations for the ideal gas heat capacity are required for each of the constituents in the mixture. All required equations and coefficients are outlined here.

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