Steam at a pressure of 15 bar and a temperature of 320C is contained in a large vessel shown below. Connected to the vessel through a valve is a turbine followed by a small initially evacuated tank with a volume of 0.6 m. When power is required, the valve is opened and the tank fills with steam until the pressure is 15 bar. The temperature in the tank is then 400C. The filling process takes place adiabatically and kinetic and 3 potential energy effects are negligible. The amount of work developed by the turbine is kJ. Vessel valve Turbine valye 70 X At 15 bar and 320C: Enthalpy of steam = 3081.9 kJ/kg At 15 bar and 400C: = Initially evacuated tank Internal energy of steam 2951.3 kJ/kg, 3 specific volume of steam = 0.2027 m/kg)