According to Boyle's Law, how does volume relate to pressure?

• A. Volume is directly proportional to pressure
• B. Volume is inversely proportional to pressure
• C. Volume and pressure are unrelated
• D. The pressure is constant regardless of the volume

Answer: (B)

Boyle's Law states that the pressure of a gas is inversely proportional to its volume when the temperature and the number of gas molecules remain constant. This means that as the volume of a gas increases, the pressure decreases, and vice versa.

In practical terms, this can be understood through the behavior of gas molecules: when the volume increases, gas molecules have more space to move around, resulting in fewer collisions with the walls of the container, which leads to lower pressure. Conversely, when the volume decreases, the gas molecules are compressed into a smaller space, leading to more frequent collisions with the container walls and higher pressure.

Therefore, the relationship between volume and pressure as described by Boyle's Law is indeed that volume is inversely proportional to pressure. This foundational principle is critical in various applications, including respiratory mechanics and understanding how different gases behave under changing conditions.