3.32. Calculate Z and V for ethylene at 25°C (298.15 K) and 12 bar by the following equa- tions: (a) The truncated virial equation [Eq. (3.40)] with the following experimental values of virial coefficients: B=-140 cm³ mol-1 C=7200 cm mol-2 (b) The truncated virial equation [Eq. (3.38)], with a value of B from the generalized Pitzer correlation [Eq. (3.63)]