Carbon-dioxide gas at 3MPa and 500 K flows steadily in a pipe at a rate of 0.4kmol/s. Determine a) the volume and mass flow rates and the density of carbon dioxide at this state. If CO2 is cooled at a constant pressure as it flows in the pipe so that the temperature of CO2 drops to 450 K at the exit of the pipe, determine b) the volume flow rate at the exit of the pipe.