In which of the following scenarios would Boyle's Law apply?

When considering Boyle's Law, which states that the pressure of a gas is inversely proportional to its volume when the temperature is held constant, the scenario involving a gas being compressed at a fixed temperature accurately illustrates this principle.

In this situation, as the volume of the gas decreases due to compression, the molecules of the gas are forced closer together, which results in an increase in pressure. The key condition for Boyle's Law to be applicable is that the temperature remains constant, ensuring that any changes in volume directly influence the pressure in a predictable manner.

This relationship is crucial in many respiratory care applications, as it helps to understand how changes in lung volume during inhalation and exhalation affect the pressure of air within the lungs.