Find the heat capacity of a system consisting of a vessel with monatomic gas
blockedbyapiston(gasparametersP , V , T ). Thepistonisheldbyaspring.
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To the left of the piston is a vacuum. If the gas is pumped out, the piston will
come into contact with the right wall of the vessel, and the spring will not be
deformed. Heat capacities of the vessel, piston and spring should be ignored.