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Air in a rigid tank is at 140 kPa, 300 K with a volume of 0.6...

Air in a rigid tank is at 140 kPa, 300 K with a volume of 0.6 m3. The tank is heated to 400 K. Now one side of the tank acts as a piston letting the air expand slowly at constant temperature process to state 3 with a volume of 1.4 m3. The total heat transfer is.

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