A heavy but frictionless piston-cylinder device with a diameter of 4 inches contains pure water. There are stops on the cylinder wall that prevent the piston from rising more than 31.7 inches above the cylinder floor. When the piston barely touches the stops, the water is a saturated vapor at 435$^\circ$F.

a) What is the mass of the water?

$\displaystyle\text{lbm}$

b) What is the pressure when the temperature is 275$^\circ$F?

$\displaystyle\text{psi}$

c) What is the pressure when the temperature is 700$^\circ$F?

$\displaystyle\text{psi}$