Compressibility diagram

FIG. 20-77 Compressibility diagram of a typical powder illustrating four stages of compaction. 

The actual compression diagram naturally deviates from the ideal the extent varying with the physical characteristics of the cylinder and the properties of the gas, Figures 12-12, 12-12A, and 12-12B. 

Figure 12-12. Reciprocating compressor compression diagrams. Actual losses and effect of k = cjc on performance.

Fig. 21. Compression diagram for (1) an epoxy syntactic foam with phenolic microspheres and (2) unfilled epoxy resin 1611...

Determine the reversible work, in liter-atm., required to expand 1 mole of carbon dioxide isothermally from an initial pressure of 200 atm. to a final pressure of 1 atm. at 50 C, assuming van der Waals behavior. (Instead of solving the cubic equation to obtain the initial and final volumes, they may be obtained more simply by means of the generalized compressibility diagram.) Compare the result mib, that to be expect for an ideal gas. 

Explain how the compressibility diagram alone could be used to determine the isothermal, reversiUe work of expansion of any gas. Apply the method to Exercise 9. 

Explain how the generalized compressibility diagram (Fig. 4) could be used to determine (i) the free energy change, (ii) the work function change, for any gas at constant temperature. 

Figure 240. Typical compressibility diagram (density versus force) of a particulate solid ...

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