A closed and sealed rigid tank contains 11 kg of liquid water at equilibrium with 1.17 kg of vapor at a pressure of 2 bar. The tank is equipped with two alarms: a pressure alarm that will sound if the pressure exceeds 10 bar; and a temperature alarm that will sound if the temperature exceeds 200 °C.

a) What is the volume of the tank?

b) Calculate the internal energy of the liquid-vapor mixture in the tank.

c) If we add heat to the tank continuously, which alarm will sound first?

d) We stop the heating when the contents are saturated vapor. How much heat has been added?

e) Which alarm(s), if any, will be sounding at the end of step (d)?

f) Draw a qualitative PV graph and sketch the path of the processes involved. Mark all the relevant isotherms and pressures.