For one of the substances in Prob. 3.62, estimate the mass of the substance contained in the size D cylinder at 20°C and 25 bar.

Problems 3.62

A size D compressed gas cylinder has an internal volume of 2.40 liters. Estimate the pressure in a size D cylinder if it contains 454g of one of the following semiconductor process gases at 20°C:
(a) Phosphine, PH₃, for which T_c = 324.8 K, P_c = 65.4 bar, and ω = 0.045
(b) Boron trifluoride, BF₃, for which T_c = 260.9 K, P_c = 49.9 bar, and ω = 0.434
(c) Silane, SiH₄, for which T_c = 269.7 K, P_c = 48.4 bar, and ω = 0.094
(d) Germane, GeH₄, for which T_c = 312.2 K, P_c = 49.5 bar, and ω = 0.151
(e) Arsine, AsH₃, for which T_c = 373 K, P_c = 65.5 bar, and ω = 0.011
(f) Nitrogen trifluoride, NF₃, for which T_c = 234 K, P_c = 44.6 bar, and ω = 0.120