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This translation from the French introduces the methods of calculating and predicting the thermodynamic properties of the processed fluids during reservoir exploitation, refining and petrochemical processing. The thermodynamic properties and phase equilibria of the mixtures are well known, but this knowledge is not only the result of experimentation, but can also be obtained from calculations based on the principles of the thermodynamics that govern them, ensure their coherence, and allow them a wide range of applications. Jean Vidal, an expert on thermodynamics as applied to fluid phases, explains the fundamental concepts and emphasizes the ‘models’ that, although they are based on simplified concepts at the molecular level, have a ‘predictive’ character. Computational examples are given to illustrate the applications of these concepts and models. |