A rigid, insulated tank is initially evacuated. The tank is connected with a supply line through which air (assumed to be ideal gas with constant specific heats) passes at 1 MPa, 350°C. A valve connected with the supply line is opened and the tank is charged with air until the final pressure inside the tank reaches 1 MPa. The final temperature inside the tank
1
is greater than 350°C
2
is less than 350°C
3
is equal to 350°C
4
May be greater than, less than, or equal to 350°C, depending on the volume of the tank