A well-insulated rigid tank of volume 10 ft^3 contains carbon dioxide, initially

Question

A well-insulated rigid tank of volume 10 ft^3 contains carbon dioxide, initially at 30 psia and 60 degrees F. The tank is connected to a large supply line carrying carbon dioxide at 120 psia, 100 degrees F. A valve between the line and the tank is opened and gas flows into the tank until the pressure reaches 120 psia, at which time the valve closes. The contents of the tank eventually cool back to 60 degrees F. Determine: (a) the temperature in the tank at the time when the valve closes, in degrees F, and (b) the final pressure in the tank, in psia.

Explanation / Answer

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