Question: A pistoncylinder device whose piston is resting on top of a set of stops initially contains 0.5 kg of helium gas at 100 kPa and

A piston–cylinder device whose piston is resting on top of a set of stops initially contains 0.5 kg of helium gas at 100 kPa and 25°C. The mass of the piston is such that 500 kPa of pressure is required to raise it. How much heat must be transferred to the helium before the piston starts rising?

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