$3-43$ Water initially at $200$ kPa and $300C$ is contained in a piston$-$cylinder device fitted with stops. The water is allowed to cool at constant pressure until it exists as a saturated vapor and the piston rests on the stops. Then the water continues to cool until the pressure is $100$ kPa $.$ On the $T-v$ diagrams sketch, with respect to the saturation lines, the process curves passing through both the initial, intermediate, and final states of the water. Label the $T,P$ and $v$ values for end states on the process curves. Find the overall change in internal energy between the initial and final states per unit mass of water.

the lid on the boiling te mass vary from $1$ kg against the mass of the

$3-48$ Water is being device. The piston has area of $150c{m}^2.$ If the determine the temperat

$3-49$ Water is boiled lid at a specified locati $2-$kW resistance heater observed to decrease b mated that $75$ percent is transferred to the wa spheric pressure in that $3-50$ A rigid tank with saturated liquid$-$vapor m is slowly heated. Determ in the tank is completely $T-vv$ diagram with respect

$3-51$

A piston$-$cy liquid water librium at $600$ kPa $.$ He