Air enters an insulated diffuser operating at steady state with a pressure of 1 bar, a temperature of 57°C, and a velocity of 200 m/s. At the exit, the pressure is 1.13 bar and the temperature is 69°C. Potential energy effects can be neglected. Using the ideal gas model with a constant specific heat cp evaluated at the inlet temperature, determine
(a) the ratio of the exit flow area to the inlet flow area.
(b) the exit velocity, in m/s.