Consider a rigid tank of the volume 15m^3. This tank is connected to a steam supply line. The tank is initially evacuated. Steam at 15 bar and 280 degrees Celcius is now allowed to flow into the tank until the pressue inside the tank reaches 15 bar. The tank is perfectly insulated. Determine: a) the amount of mass of the steam flowed into tank in kg b) the temperature of the steam in the tank in degrees.