An evacuated insulated tank is connected to a pipe transporting steam at 800 kPa and 400°C. A valve is then opened and steam fills the tank. The temperature in the tank when P = 800 kPa is nearest:
A) 582°C
B) 543°C
C) 528°C
D) 505°C
A) 582°C
The energy equation (4.35) is used: 
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