Air enters a compressor operating at steady state with pressure of 1 atm, at a temperature of 350 K, and a volumetric flow rate of 0.6 m3 /s. The air exits the compressor at a pressure of 6 atm. Heat transfer from the compressor to its surrounding occurs at a rate of 30 kJ/kg of air flowing. The compressor power input is 75 kW. Neglecting kinetic and potential energy effects and assuming air to be an ideal gas, please determine the exit temperature.

At steady state, air at 200 kpa, 325 k, and mass flow rate of 0.5 kg/s enters an insulated duct having differing inlet and exit cross-sectional areas. the inlet cross-sectional area is 6 cm2. at the duct exit, the pressure of the air is 100 kpa and the velocity is 250 m/s. neglecting potential energy effects and modeling air as an 1.008 kj/kg k, determine ideal gas with constant cp = (a) the velocity of the air at the inlet, in m/s. (b) the temperature of the air at the exit, in k. (c) the exit cross-sectional area, in cm2