# HW_7 - than they do on pressure Thus ± ²³´ Eq 1 for...

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Homework Assignment 7 1. Fill in the following table for water: P[kPa] T[°C] v[m 3 /kg] x 500 20 500 0.2 1400 200 300 0.8 2. Complete the following table for R-134a. In the description column describe the state of the substance (compressed liquid, liquid vapor mix, etc.) P[kPa] T[°C] v[m 3 /kg] u [kJ/kg] Description 320 -12 1000 39.37 40 0.17794 180 0.07 200 249 3. Repeat problem 1 using EES. 4. The text states that “In the absence of compressed liquid data, a general approximation is to treat compressed liquid as saturated liquid at the given temperature . This is because the compressed liquid properties depend on temperature much more strongly

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Unformatted text preview: than they do on pressure. Thus, ± ²³´ Eq. 1 for compressed liquids,” where y can be any property besides pressure. [1] Figure 1 shows a pressure-volume diagram with several isotherms included. Explain how Figure 1 demonstrates that Eq. 1 is a valid approximation. Figure 1. Pressure-volume diagram with several isotherms included. 5. Are the pressures listed in the appendix absolute pressures or gage pressures? Due Friday June 18, 2010 10:00AM References: 1. Cengel, Yunus and Michael A. Boles. Thermodynamics: An Engineering Approach, 6 th Ed . McGraw-Hill. Boston. 2008....
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HW_7 - than they do on pressure Thus ± ²³´ Eq 1 for...

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