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0066_frame_C12  Page 21  Wednesday, January 9, 2002  4:22 PM



























                                                         vp c /RT c ) for p R  ≤ 10. (Source: Obert, E.F. 1960 Concepts of Thermodynamics. McGraw-
                                                         =
                                                         Generalized compressibility chart (T R  = T/T c , p R  = p/p c , v′ R
















                                                         FIGURE 12.5  Hill, New York.)  ©2002 CRC Press LLC
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