A container which has a volume of 0.1 m³ is fitted with a plunger enclosing 0.5 kg of steam at 0.4 MPa. Calculate the amount of heat transferred and the work done when the steam is heated to 300°C at constant pressure.

Water enclosed in a rigid tank is heated from 120°C to 250°C. The pressure is high enough that the water remains subcooled (compressed) liquid during the process. Determine the thermal energy needed for the process (in kJ) if the mass of water is 8 kg. You can use water property tables or the incompressible substance assumption.

A rigid tank of volume 2.5 m3 contains 15 kg of moist water vapor at 75°C. The water is then slowly heated. Determine the temperature at which the liquid, which is part of the wet vapor, in the tank evaporates completely. Determine the change in internal energy of the system. Also describe the process on a T-V diagram with respect to the saturation lines.

A 752-cm sample of water was placed in a 1.00-kg aluminum pan. The inital temperature of the pan was 26°C and the final temperature of the system was 39°C. What was the initial temperature of the water?