Purpose
This interactive allows you to explore adiabatic, isothermal, isobaric, and isochoric thermodynamic processes.

Using the Interactive

• Configure the interactive using the sliders, checkboxes, menu, and button located along the bottom.
• The cylinder contains a gas that pushes against a piston. There is a heat reservoir that can be removed from the cylinder. The large graph plots pressure versus volume. The small graph (floating graph) plots certain quantities versus time.
• A text box just below the cylinder identifies (in boldface) which type of process is currently underway.

• Clear Graph: Clears the P-V graph only.
• Floating Graph: Selects the quantity to be plotted vs. time in the small, white floating graph or hides the graph.
• Use Reservoir: When checked, a heat reservoir is connected to the bottom of the cylinder.
• Lock Piston: When checked, the piston does not move.
• Temperature: Changes the temperature of the heat reservoir.
• Position: Sets the position of the piston on the graduated scale of the cylinder.
• For Isothermal Processes: Check USE RESERVOIR and change only the POSITION (volume) of the gas.
• For Isobaric Processes: Check USE RESERVOIR and change only the TEMPERATURE.
• For Adiabatic Processes: Uncheck USE RESERVOIR and change the POSITION (volume) of the gas.
• For Isochoric Processes: Check both USE RESERVOIR and LOCK PISTON and change only the TEMPERATURE.

1			After the interactive loads, set the TEMPERATURE to 600.0 K. Click CLEAR GRAPH. The gas will be held at a constant temperature. What will happen to the gas pressure as the piston is lowered?
			A)	It will decrease linearly with the volume of the gas
			B)	It will increase linearly with the volume of the gas
			C)	It will decrease along a curved path in the P-V diagram
			D)	It will increase along a curved path in the P-V diagram
2			Now check LOCK PISTON. The gas will be held at a constant volume. What will happen to the gas pressure as the temperature is lowered?
			A)	It will decrease linearly with the temperature of the gas
			B)	It will increase linearly with the temperature of the gas
			C)	It will decrease along a curved path in the pressure vs. time graph
			D)	It will increase along a curved path in the pressure vs. time graph