Many substances that normally do not mix well do so easily under supercritical pressures. A mass of 125 kg ethylene at 7.5 MPa, 296.5 K is stored for such a process. How much volume does it occupy?
There is no section B table for ethylene so use compressibility chart.
Ethylene Tc = 282.4 K Pc = 5.04 MPa
Tr = T/Tc = 296.5 / 282.4 = 1.05 ; Pr = P/Pc = 7.5 / 5.04 = 1.49
Z = 0.32
V = mZRT / P = 125 × 0.32 × 0.2964 × 296.5 / 7500 = 0.469 m3
