Given the truncated virial equation for

calculate the pressure for T = 180 K and v = 0.03 m³/kg and calculate the specific volume for P = 0.3 MPa and T = 320 K. Compare the values with the values obtained with the ideal gas equation of state. Indicate the points corresponding to this states in the P-h diagram of Appendix A.5 and highlight the thermodynamic region where the ideal gas assumption applies. The critical temperature and pressure of methane are T_c?= 190.6 K and P_c = 4.60 MPa, respectively, the molecular weight M? = 16.04 kg/kmol, the acentric factor ? = 0.0114, and T_r?= T/T_c.

Data From Appendix A.5

Transcribed Image Text:

methane Z=1+ B(T) = RTC Pe B (T) V with 0.422 T1.6 + (0.139-047)] 0.083