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A container has a tight fitting movable piston which can slide without friction. The compartment containing spring has vacuum and to the left of the piston there is diatomic gas. If vacuum is created in the right compartment also the piston touches the right wall and the spring is relaxed. Find the heat capacity of the system neglecting the heat capacities of the material of spring, container and the piston. Express your answer in terms of `P_(0), V_(0)` and `T_(0)`.

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The correct Answer is:
`C = (3P_(0)V_(0))/(T_(0))`
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