9. The storage in a river reach at a given time is 4.5 x 108 m3. Inflow to the reach is 25 m3/sec and outflow is 40 m3/sec, groundwater flow into the reach is 7 m3/sec, groundwater outflow is 5 m3/sec. After a 4 hour period determine a) the change in storage and b) total storage in the reach.

Apiston-cylinder device contains 0.1 m3 of liquid water and 0.9 m3 of water vapor in equilibrium at 800 kpa. heat is transferred at constant pressure until the temperature of water reaches 350 °c. determine (a) the quality of water at the initial state (b) the work associated with this process, (c) the heat associated with this process.