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A vessel with a frictionless piston contains 1 ft^3 of a gas at 200 psia. The piston is held in position by applying an external force. Calculate the amount of work done if:
a) This external force is released gradually until the volume is doubled in such a way that PV is always constant.
b) This external force is released suddenly to half its initial value.
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ater enters a reversible steady-state device at 125degc and 400 kpa and leaves at 300degc and 200 kpa. heat is added
a rigid tank is divided into two equal parts by a partition. one part of the tank contains 3.1 kg of compressed liquid
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