Air enters a 28-cm diameter pipe steadily at 200 kPa and 20°C with a velocity of 5 m/s. Air is heated as it flows, and leaves the pipe at 180 kPa and 40°C. Determine (a) the volume flow rate of air at the inlet, (b) the mass flow rate of air, and (c) the velocity and volume flow rate at the exit.

Step by step solution Step 1 of 6(a)Calculate the volume flow rate of air at the inlet of the pipe as follows:Here, the cross-sectional area of pipe is , diameter of pipe is , and velocity of air is .Substitute for , and for .