A200-l tank (see fig. p4.107) initially contains water at 100 kpa and a quality of 1%. heat is transferred to the water, thereby raising its pressure and temperature. at a pressure of 2 mpa, a safety valve opens and saturated vapor at 2 mpa flows out. the process continues, maintaining 2 mpa inside until the quality in the tank is 90%, then stops. determine the total mass of water that flowed out and the total heat transfer.

Apiping systems consists of 6 m of 6-std type k and 12 m of 4-std type k, both drawn copper tubing. the system conveys ethylene glycol at a rate of 0.013 m3/s. the pressure drop across the system is to be calculated. there are two 90° elbows in the 6-in pipe, a reduction from the 6-in pipe to the 4-in pipe and four 90° elbows in the 4-in pipe. all fittings are soldered (same as flanged) and regular. the inlet and outlet of the system are at the same height.