Steam enters a nozzle operating at steady state at 4 MPa, 280 oC with a velocity of 70 m/s. The exit pressure and temperature are 0.7 MPa and 165.0 oC, respectively. During testing it was observed that no water condensed at the exit. The mass flow rate is 4 kg/s. Neglecting the heat transfer and potential energy, determine:(a) the exit velocity in m/s, (b) the inlet and exit flow areas.

Asteam is contained in a rigid tank with a volume of 1 m3. initially, the pressure and temperature are 7 bar and 500 oc, respectively. the temperature drops due to cooling process. determine: (1) the temperature at which condensation begins in °c, (2) the fraction of the total mass that has condensed when the pressure decreased to 0.5 bar. (3) the volume in m3 occupied by saturated liquid at the final state?