Steam is accelerated by a nozzle at a steady mass flow rate of 2 kg/s. If the steam at the nozzle exit is at 400°C and 3 MPa, and its velocity is 180 m/s, what is the exit area of the nozzle? If the velocity at the inlet of the nozzle is 80 m/s, what is the enthalpy of the steam at the inlet?

Ten cu ft of air at 30 psia and 400°F is cooled to 140°F at constant volume. What is the change in entropy ? Group of answer choices -0. 0581 Btu/oR +0. 20 Btu/oR 0 +0. 581 Btu/oR

Air enters an adiabatic nozzle at 45 psia and 940Fwith low velocity and exits at 650 ft/s. If the isentropic efficiencyof the nozzle is 85 percent, determine the exit temperatureand pressure of the air.

A piston cylinder contains 1.25 kg water at 25°C with a constant load on the piston such that the pressure is 300 kPa. A nozzle in a line to the cylinder is opened to enable flow to the outside atmosphere at 100 kPa and 25°C. The process continues until 85% of the initial mass has flowed out. At this point, the temperature of water increased by 10°C. Assume that the process is done in an Water isobaric manner. Write the mass and energy balance equations and calculate the work (kJ) and heat (kJ) involved in the process if the exit velocity is 40 m/s. For compressed liquid, assume the substance is a saturated liquid at the given temperature.