Example 2.2 Calculate the acentric factor for benzene. Critical temperature and critical pressure are 561.65 °K, and 47.7 atm, respectively.

Solution

$ Pitzer's temperature, T_P (Equation 2.6):

$ Vapor pressure of benzene at Pitzer's temperature, P_P:

P_P = 2.974 atm.

$ Pitzer acentric factor, ω (Equation 2.5):

$