CHE 421

Thermodynamics

Sample Problems

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• Interpolation: Many problems require numbers be interpolated in tables. Use Mathcad for this.
• Regression: Use Mathcad for multivariable regression to interpolate/extrapolated in tables.
• General Introduction to Mathcad: Includes many examples of using Mathcad to solve thermo and other problems.
• Equation Breaks: Shows how to break long equations and write them on two or three lines.

• Example 3.8: Calculation of vapor and liquid volumes from the R/K EOS
• Example 4.7: Adiabatic temperature change using the summation method
• Example 4.7: Adiabatic temperature change using the vector method
• Problem 6.53: Real gas enthalpy and entropy changes using the virial and the R/K equations
• Example 10-4: Dewpoint and bubblepoint pressures using the DePriester charts
• VLE Data Reduction: Data for chloroform/1,4-dioxane discussed on p. 425, ff
• Problem 12.17: Calculation of dewpoint and bubblepoint pressures, P-T flash, P-X-y and T-x-y diagrams for the acetone/water system using the NRTL equation
• Example 13.9: SO2 oxidation reaction
• Problem 5, exam 1: Finding the work for a real fluid with Mathcad. The plot may take a few seconds to appear because of the large amount of computations involved.