Shown below is a gas contained in a cylinder with a piston.

Suppose that 150 J of energy is added to the system under these two scenarios:
(a) the piston is allowed to move
(b) the piston is not allowed to move
In which scenario does the gas have higher temperature after the input of energy?

• A. Scenario (a) leads to a higher temperature.
• B. Scenario (b) leads to a higher temperature.
• C. Both scenario leads to the same temperature.
• D. Cannot be determined.

Answer: (B)