Which law relates the pressure and volume of a gas at constant temperature?

• A. Charles's Law
• B. Boyle's Law
• C. Avogadro's Law
• D. Graham's Law

Answer: (B)

Boyle's Law describes the relationship between the pressure and volume of a gas when the temperature remains constant. According to this law, as the volume of a gas decreases, its pressure increases proportionally, and vice versa, as long as the temperature does not change. This is mathematically represented by the equation PV = k, where P is pressure, V is volume, and k is a constant for a given amount of gas at a fixed temperature.

Understanding Boyle's Law is essential in various scientific applications, such as in understanding how breathing works in the human body and how gases behave under different conditions in chemical reactions and physical processes. This law highlights the inverse relationship between pressure and volume, emphasizing that they are dependent on each other in a closed system where temperature is held constant.