* A gas is contained in a vertical, frictionless piston-cylinder device. The piston has a mass...

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* A gas is contained in a vertical, frictionless piston-cylinder device. The piston has a mass...

* A gas is contained in a vertical, frictionless piston-cylinder device. The piston has a mass of 2 kg and a cross-sectional area of 30 cm2. A spring above the piston is compressed by 2.5 mm and has a spring constant, k, of 38 kN/m.

a. If the atmospheric pressure is 1 atm, determine the initial pressure (P1) inside the cylinder. Heat is added to the system until the piston moves an additional 10 mm.

b. How much did the volume change during this process?

c. What is the new pressure (P2) inside the cylinder?

d. Draw a P- diagram for this process. On the diagram, draw a line depicting an isobaric process starting at the same initial pressure and producing the same volume change.

e. How much energy is needed for the isobaric process?

f. How much work is needed to move the spring the additional 10 mm? How much work is needed to increase the pressure to P2?

g. What is the total amount of work done by the system on the piston?

Answers to those questions with appropriate assumptions and analysis...?

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Answer 1

Answer #1

29 0 1DU p 2.stw PL-2ST Aに 2.57 1-31 AB 2- since gravitational work was negligible, it's safe to exclude gravity from analysis. However including mg will give a more accurate result.

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* A gas is contained in a vertical, frictionless piston-cylinder device. The piston has a mass...

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