ThermoSolver software

Given two of the measured properties P, v, and T, calculate the value of the third using cubic equations of state (e.g., van derWaals, Redlich-Kwong, Peng-Robinson), the virial equation, generalized compressibility charts, and ThermoSolver software. Apply the Rackett equation, the thermal expansion coefficient, and the isothermal compressibility to find molar volumes of liquids and solids. 

The compressibility factor at the critical point is found to be = 0.307. The Peng-Robinson equation is an option in the equation of state menu of the ThermoSolver software that comes with the text. 

In the ThermoSolver software that comes with the text, go to the Models for g — Parameter Fitting menu. Find best-fit model parameters for the ethanol (a) and water (b) system at 74.79°C for the following activity coefficient models ... 

Re-solve Example 4.9 using the text software, ThermoSolver. Compare your answer to the answer that is given in the example. 

Consider a mixture of CH4 and H2S at 444 K and 70 bar. Use the results of Example 7.4 to plot the fugacity coefficient of methane as a function of methane mole fraction using the van der Waals equation of state and mixing rules. Compare the result with that obtained from the text software, ThermoSolver, using the Peng-Robinson equation of state. 

This set of equations was solved by a modified Newton-Raphson root finder using the text software ThermoSolver. For more detail, see the ThermoSolver documentation. 

For a more complete set of compounds, consult ThermoSolver, the text software. 

The Species Database provides all of the thermodynamic data used by the rest of the software. Thus, if a species is not available elsewhere in ThermoSolver, there are two causes Either the given species does not have all of the fields filled in that are required for the calculation, or the species is not in the database. Edits can be made to the database. The program wiU ask if the changes are to be saved when the Species Database is closed. 

Choose Chemical Reaction Equilibria from the ThermoSolver main menu, then choose the Reaction Equilibria Calculations. The reaction equilibria program solves for the composition of a reacting system at equilibrium, using the Gibbs energy minimization method discussed in Section 9.6. The software is limited to gases and solids. 

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