A0.1 m8 rigid storage tank initially contains superheated steam at 1 mpa and 200 °c. the tank is then cooled to 150 °c to condense some of the steam so that the final contents in the tank contain a mixture of saturated liquid water and saturated vapor steam. what is the final pressure in the tank and how much mass of liquid water and vapor steam are present in the final mixture? how much energy is used to cool the tank?