A piston-cylinder device contains 0.02 m3 of hydrogen at 300 K. It has a diameter of 10 cm. The piston (assumed weightless) is pulled by a connecting rod perpendicular to the piston surface. If the outside conditions are 100 kPa and 300 K,
(a) Determine the pull force necessary in kN to create a pressure of 50 kPa inside.
(b) The piston is now released; as it oscillates back and forth and finally comes to equilibrium, the temperature inside is measured as 600 K (reasons unknown). What is the pressure of hydrogen at equilibrium?
(c) What-if Scenario: What would be the answer in part (a) if the gas were oxygen instead?