Carbon dioxide gas enters a pipe at 3 MPa and 500 K at a rate of 2 kg/s. CO2 is cooled at constant pressure as it flows in the pipe and the temperature of CO2 drops to 450 K at the exit. Determine the volume flow rate and the density of carbon dioxide at the inlet and the volume flow rate at the exit of the pipe using
(a) The ideal-gas equation and
(b) The generalized compressibility chart. Also, determine
(c) The error involved in the first case.

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3 MPa 500 K 2 kg's 450 K FIGURE P3-91