Carbon dioxide flows through an insulated pipe 25 m long and 8 cm in diameter. The friction factor is 0.025. At the entrance, p = 300 kPa and T = 400 K. The mass flow is 1.5 kg/s. Estimate the pressure drop by
(a) Compressible; and
(b) Incompressible (Sect. 6.6) flow theory.
(c) For what pipe length will the exit flow be choked?