1.Saturated liquid water at 1.0 MPa is throttled adiabatically to a pressure of 0.4 MPa. If the change is kinetic energy is negligible, what percentage of the water evaporates during this throttling process?
2.A 50-ohm electrical resistor carries a current of 5 amperes. The resistor is maintained at a temperature of 30o C. Determine the rate at which heat must be transferred to the surroundings and the rate of entropy change of the resistor.
3.Wet steam at a pressure of 1382 kPa and a quality of 99% is throttled to a pressure of 689.5 kPA. Find the temperature after throttling.