Air with a mass flow rate of 2 kg/s enters a horizontal nozzle operating at steady state at 450K, 350 kPa, and velocity of 3 m/s. At the exit, the temperature is 300 K and the velocity is 460 m/s. Assume air is an ideal gas. (a) Draw a schematic and list all assumptions. (b) Identify if you want to treat air to have a constant specific heat or variable specific heat. Calculate the change in specific enthalpy of air (in kJ/kg) between the nozzle outlet and the inlet based on your assumption. (c) Determine the rate of heat transfer between the nozzle at its surroundings (in kJ/s). Specify whether the heat transfer is to or from the air.

Liquid flows at steady state at a rate of 2 lb/'s through a pump, which operates to raise the elevation of the liquid 100 ft from control volume inlet to exit. the liquid specific enthalpy at the inlet is 40.09 btu/lb and at the exit is 40.94 btub. the pump requires 3 btu/s of power to operate. if kinetic energy effects are negligible and gravitational acceleration is 32.174 tt/s, the heat transfer rate associated with this steady state process is most closely 1)-2,02 btu/s from the liquid to the surroundings 2)-3.98 btu/s from the surroundings to the liquid. 3)-4.96 btu/s from the surroundings to the liquid. 4)-1.04 btu/s from the liquid to the surroundings.