3-82. Determine the specific volume of superheated water vapor at 15 MPa and 350°C, using (a) the ideal-gas equation, (b) the generalized compressibility chart, and (c) the steam tables. Also determine the error involved in the first two cases.
Answers: (a) 0.01917 m3/kg, 67.0 percent, (b) 0.01246 m3/kg, 8.5 percent, (c) 0.01148 m3/kg
3-83. Reconsider Prob. 3–82. Solve the problem using the generalized compressibility factor feature of the EES software. Again using EES, compare the specific volume of water for the three cases at 15 MPa over the temperature range of 350 to 600°C in 25°C intervals. Plot the percent error involved in the ideal-gas approximation against temperature, and discuss the results.
Extracted text: 3-82. Determine the specific volume of superheated water vapor at 15 MPa and 350°C, using (a) the ideal-gas equation, (b) the generalized compressibility chart, and (c) the steam tables. Also determine the error involved in the first two cases. Answers: (a) 0.01917 m/kg, 67.0 percent, (b) 0.01246 m²/kg, 8.5 percent, (c) 0.01148 m³/kg 3-83. Reconsider Prob. 3-82. Solve the problem using the generalized compressibility factor feature of the EES software. Again using EES, compare the specific volume of water for the three cases at 15 MPa over the temperature range of 350 to 600°C in 25°C intervals. Plot the percent error involved in the ideal-gas approximation against temperature, and discuss the results.