The cylinder shown below has an open top, and gas is held inside it by a piston of mass m and area A. The gas is insulated from its surroundings and is initially in equilibrium at volume Vi . Express all algebraic answers in terms of the given quantities and fundamental constants.
The gas is heated by a circuit that contains three resistors, each of known resistance
R0, connected in parallel to a power source of emf
. The piston is held fixed so that the gas remains at constant volume while being heated for a period of time
t.
After the time t, the circuit is disconnected. The piston is then released and the gas is allowed to expand adiabatically until it reaches volume Vf.
| (d) Indicate below whether the temperature increases, decreases, or remains the same during this process. Justify your answer.
_____ Increases _____ Decreases _____ Remains the same |
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| (e) The gas is then compressed isothermally to its original pressure and volume. On the axes below, draw a PV diagram for the complete cycle described in this question, labeling Vi and Vf on the volume axis. |
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