HW #$2-3$ The spring$-$loaded piston$-$cylinder device is filled with $0\mathrm{.}5$ kg of water vapor that is initially at $3$MPa

and $350C.$ Initially, the spring exerts no force against the piston.

The spring constant in the spring force relation $F=kx$ is $k=1k\frac{N}{c}m$ and the piston diameter is $D=20cm.$

The water now undergoes a process until its volume is one$-$half of the original volume.

Calculate the temperature and the specific enthalpy of the water at the final state, and the total internal energy

change during this process