In a cylindrical vessel, divided into two parts by a freely moving piston, there is one mole of an ideal monatomic gas on each side of the piston. The temperature in one part of the vessel is kept constant. Find the heat capacity of the gas in another part of the vessel with the piston in the middle of the vessel. The piston does not conduct heat.

Detailed solution with a short recording of the conditions, laws and formulas used in the decision, the withdrawal of the calculation formula and the answer.
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