Air flows through a section of a duct that is being cooled by liquid nitrogen. At the entrance to this cooled section, the temperature, pressure, and velocity of the air are 130◦C, 210 kPa, and 190...

Air flows through a section of a duct that is being cooled by liquid nitrogen. At the entrance to this cooled section, the temperature, pressure, and velocity of the air are 130◦C, 210 kPa, and 190 m/s, respectively. At the exit from this section, the temperature and pressure are 75◦C and 230 kPa, respectively. The cross-sectional area of the duct is 6 cm2 . Estimate the mass flow rate through the duct, the change in enthalpy, the change in internal energy, and the change in entropy between the inflow and outflow sections.